diff --git a/.eslintrc.js b/.eslintrc.js
index bfd36aaf22..5d56a803b8 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -54,6 +54,12 @@ module.exports = {
         'standard'
       ]
     },
+    {
+      files: ['**/*.test.js'],
+      extends: ['standard'],
+      plugins: ['eslint-plugin-jest'],
+      env: { jest: true }
+    },
     // linting for ts files
     {
       files: ['**/*.ts'],
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 043a2a4417..ca0ea66981 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@
 ### Fixed
 
 - (plugin-express|plugin-koa|plugin-restify) Fix parts of request metadata being missing from some events [#1879](https://github.com/bugsnag/bugsnag-js/pull/1879)
+- (plugin-aws-lambda) Fix a bug when used with a server plugin (Express, Koa or Restify) causing internal callbacks to be added multiple times and reporting the wrong request data [#1887](https://github.com/bugsnag/bugsnag-js/pull/1887)
 
 ## v7.18.2 (2022-11-01)
 
diff --git a/packages/plugin-aws-lambda/package-lock.json b/packages/plugin-aws-lambda/package-lock.json
new file mode 100644
index 0000000000..cbddd66414
--- /dev/null
+++ b/packages/plugin-aws-lambda/package-lock.json
@@ -0,0 +1,1164 @@
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+			"name": "@bugsnag/plugin-aws-lambda",
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+				"@vendia/serverless-express": "^4.10.1",
+				"express": "^4.18.2"
+			},
+			"peerDependencies": {
+				"@bugsnag/core": "^7.0.0"
+			}
+		},
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diff --git a/packages/plugin-aws-lambda/package.json b/packages/plugin-aws-lambda/package.json
index 0fc937302d..4c6e6b29dc 100644
--- a/packages/plugin-aws-lambda/package.json
+++ b/packages/plugin-aws-lambda/package.json
@@ -27,7 +27,10 @@
     "@bugsnag/plugin-browser-session": "^7.18.0"
   },
   "devDependencies": {
-    "@bugsnag/core": "^7.18.0"
+    "@bugsnag/core": "^7.18.0",
+    "@types/aws-lambda": "^8.10.76",
+    "@vendia/serverless-express": "^4.10.1",
+    "express": "^4.18.2"
   },
   "peerDependencies": {
     "@bugsnag/core": "^7.0.0"
diff --git a/packages/plugin-aws-lambda/src/index.js b/packages/plugin-aws-lambda/src/index.js
index 5a65228ad3..512cbef65d 100644
--- a/packages/plugin-aws-lambda/src/index.js
+++ b/packages/plugin-aws-lambda/src/index.js
@@ -1,6 +1,7 @@
 const bugsnagInFlight = require('@bugsnag/in-flight')
-const BugsnagPluginBrowserSession = require('@bugsnag/plugin-browser-session')
+const BugsnagPluginAwsLambdaSession = require('./session')
 const LambdaTimeoutApproaching = require('./lambda-timeout-approaching')
+const isServerPluginLoaded = require('./is-server-plugin-loaded')
 
 // JS timers use a signed 32 bit integer for the millisecond parameter. SAM's
 // "local invoke" has a bug that means it exceeds this amount, resulting in
@@ -12,7 +13,7 @@ const BugsnagPluginAwsLambda = {
 
   load (client) {
     bugsnagInFlight.trackInFlight(client)
-    client._loadPlugin(BugsnagPluginBrowserSession)
+    client._loadPlugin(BugsnagPluginAwsLambdaSession)
 
     // Reset the app duration between invocations, if the plugin is loaded
     const appDurationPlugin = client.getPlugin('appDuration')
@@ -89,7 +90,10 @@ function wrapHandler (client, flushTimeoutMs, lambdaTimeoutNotifyMs, handler) {
 
     client.addMetadata('AWS Lambda context', context)
 
-    if (client._config.autoTrackSessions) {
+    // track sessions if autoTrackSessions is enabled and no server plugin is
+    // loaded - the server plugins handle starting sessions automatically, so
+    // we don't need to start one as well
+    if (client._config.autoTrackSessions && !isServerPluginLoaded(client)) {
       client.startSession()
     }
 
diff --git a/packages/plugin-aws-lambda/src/is-server-plugin-loaded.js b/packages/plugin-aws-lambda/src/is-server-plugin-loaded.js
new file mode 100644
index 0000000000..ec91e759be
--- /dev/null
+++ b/packages/plugin-aws-lambda/src/is-server-plugin-loaded.js
@@ -0,0 +1,3 @@
+const serverPluginNames = ['express', 'koa', 'restify']
+
+module.exports = client => serverPluginNames.some(name => client.getPlugin(name))
diff --git a/packages/plugin-aws-lambda/src/session.js b/packages/plugin-aws-lambda/src/session.js
new file mode 100644
index 0000000000..6c558d7bd5
--- /dev/null
+++ b/packages/plugin-aws-lambda/src/session.js
@@ -0,0 +1,18 @@
+const clone = require('@bugsnag/core/lib/clone-client')
+const BugsnagPluginBrowserSession = require('@bugsnag/plugin-browser-session')
+const isServerPluginLoaded = require('./is-server-plugin-loaded')
+
+module.exports = {
+  load: client => {
+    client._loadPlugin(BugsnagPluginBrowserSession)
+
+    const oldStartSession = client._sessionDelegate.startSession
+
+    // clone the client when startSession is called if a server plugin is loaded
+    client._sessionDelegate.startSession = function (client, session) {
+      const maybeCloned = isServerPluginLoaded(client) ? clone(client) : client
+
+      return oldStartSession(maybeCloned, session)
+    }
+  }
+}
diff --git a/packages/plugin-aws-lambda/test/serverless-express.test.js b/packages/plugin-aws-lambda/test/serverless-express.test.js
new file mode 100644
index 0000000000..0212eca34e
--- /dev/null
+++ b/packages/plugin-aws-lambda/test/serverless-express.test.js
@@ -0,0 +1,285 @@
+/**
+ * @jest-environment node
+ */
+
+// require the raw source files to avoid getting the built files - otherwise
+// we'd need to rebuild these packages to see any changes reflected in this file
+const Bugsnag = require('../../node/src/notifier')
+const BugsnagPluginAwsLambda = require('../../plugin-aws-lambda/src/index')
+const BugsnagPluginExpress = require('../../plugin-express/src/express')
+const serverlessExpress = require('@vendia/serverless-express')
+const express = require('express')
+
+let sentEvents
+let sentSessions
+
+describe('serverless express', function () {
+  beforeEach(function () {
+    sentEvents = []
+    sentSessions = []
+  })
+
+  it('sets the correct request data for each request', async function () {
+    const client = makeClient()
+    const lambdaHandler = makeLambdaHandler(client)
+    const lambdaEvent = makeAwsLambdaEvent('/abc?a=b&c=d&e=f')
+    const lambdaContext = makeAwsLambdaContext()
+
+    const response = await lambdaHandler(lambdaEvent, lambdaContext)
+
+    expect(response.body).toEqual('abc')
+    expect(response.statusCode).toEqual(200)
+
+    expect(sentEvents).toHaveLength(1)
+    expect(sentSessions).toHaveLength(1)
+    expect(sentEvents[0].events).toHaveLength(1)
+
+    const event = sentEvents[0].events[0]
+    expect(event.errors).toHaveLength(1)
+    expect(event.errors[0].errorMessage).toEqual('abc')
+    expect(event._metadata.request.path).toEqual('/abc')
+    expect(event._metadata.request.query).toEqual({ a: 'b', c: 'd', e: 'f' })
+    expect(event.request).toEqual({
+      body: undefined,
+      clientIp: '127.0.0.1',
+      headers: {
+        accept: '*/*',
+        host: 'localhost:3000',
+        'user-agent': 'bugsnag aws lambda test',
+        'x-forwarded-port': '3000',
+        'x-forwarded-proto': 'http'
+      },
+      httpMethod: 'GET',
+      url: 'https://localhost/abc?a=b&c=d&e=f',
+      referer: undefined
+    })
+
+    expect(event._session.toJSON()).toEqual({
+      events: {
+        handled: 1,
+        unhandled: 0
+      },
+      id: expect.any(String),
+      startedAt: expect.any(Date)
+    })
+
+    const lambdaEvent2 = makeAwsLambdaEvent('/xyz?x=a&y=b&z=c')
+    const response2 = await lambdaHandler(lambdaEvent2, lambdaContext)
+
+    expect(response2.body).toEqual('xyz')
+    expect(response2.statusCode).toEqual(200)
+
+    expect(sentEvents).toHaveLength(2)
+    expect(sentSessions).toHaveLength(2)
+    expect(sentEvents[1].events).toHaveLength(1)
+
+    const event2 = sentEvents[1].events[0]
+    expect(event2.errors).toHaveLength(1)
+    expect(event2.errors[0].errorMessage).toEqual('xyz')
+    expect(event2._metadata.request.path).toEqual('/xyz')
+    expect(event2._metadata.request.query).toEqual({ x: 'a', y: 'b', z: 'c' })
+    expect(event2.request).toEqual({
+      body: undefined,
+      clientIp: '127.0.0.1',
+      headers: {
+        accept: '*/*',
+        host: 'localhost:3000',
+        'user-agent': 'bugsnag aws lambda test',
+        'x-forwarded-port': '3000',
+        'x-forwarded-proto': 'http'
+      },
+      httpMethod: 'GET',
+      url: 'https://localhost/xyz?x=a&y=b&z=c',
+      referer: undefined
+    })
+
+    expect(event2._session.toJSON()).toEqual({
+      events: {
+        handled: 1,
+        unhandled: 0
+      },
+      id: expect.any(String),
+      startedAt: expect.any(Date)
+    })
+
+    const lambdaEvent3 = makeAwsLambdaEvent('/aaa?a=1&z=2')
+    const response3 = await lambdaHandler(lambdaEvent3, lambdaContext)
+
+    expect(response3.body).toEqual(':^)')
+    expect(response3.statusCode).toEqual(200)
+
+    expect(sentEvents).toHaveLength(3)
+    expect(sentSessions).toHaveLength(3)
+    expect(sentEvents[2].events).toHaveLength(1)
+
+    const event3 = sentEvents[2].events[0]
+    expect(event3.errors).toHaveLength(1)
+    expect(event3.errors[0].errorMessage).toEqual('aaa')
+    expect(event3._metadata.request.path).toEqual('/aaa')
+    expect(event3._metadata.request.query).toEqual({ a: '1', z: '2' })
+    expect(event3.request).toEqual({
+      body: undefined,
+      clientIp: '127.0.0.1',
+      headers: {
+        accept: '*/*',
+        host: 'localhost:3000',
+        'user-agent': 'bugsnag aws lambda test',
+        'x-forwarded-port': '3000',
+        'x-forwarded-proto': 'http'
+      },
+      httpMethod: 'GET',
+      url: 'https://localhost/aaa?a=1&z=2',
+      referer: undefined
+    })
+
+    expect(event3._session.toJSON()).toEqual({
+      events: {
+        handled: 1,
+        unhandled: 0
+      },
+      id: expect.any(String),
+      startedAt: expect.any(Date)
+    })
+  })
+})
+
+function makeClient () {
+  const client = Bugsnag.createClient({
+    apiKey: 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa',
+    plugins: [BugsnagPluginAwsLambda, BugsnagPluginExpress]
+  })
+
+  client._setDelivery(() => ({
+    sendEvent (payload, callback = () => {}) {
+      sentEvents.push(payload)
+      callback()
+    },
+    sendSession (payload, callback = () => {}) {
+      sentSessions.push(payload)
+      callback()
+    }
+  }))
+
+  return client
+}
+
+function makeExpressApp (client) {
+  const app = express()
+  const middleware = client.getPlugin('express')
+
+  app.use(middleware.requestHandler)
+
+  app.get('/', function (req, res) {
+    throw new Error('oh no')
+  })
+
+  app.get('/abc', function (req, res) {
+    req.bugsnag.notify(new Error('abc'))
+
+    res.send('abc')
+  })
+
+  app.get('/xyz', function (req, res) {
+    req.bugsnag.notify(new Error('xyz'))
+
+    res.send('xyz')
+  })
+
+  app.get('/aaa', function (req, res) {
+    req.bugsnag.notify(new Error('aaa'))
+
+    res.send(':^)')
+  })
+
+  app.use(middleware.errorHandler)
+
+  return app
+}
+
+function makeLambdaHandler (client) {
+  const app = makeExpressApp(client)
+  const bugsnagHandler = client.getPlugin('awsLambda').createHandler()
+
+  return bugsnagHandler(serverlessExpress({ app }))
+}
+
+function makeAwsLambdaEvent (path = '/') {
+  const url = new URL(path, 'http://localhost:3000')
+
+  const queryStringParameters = {}
+  const multiValueQueryStringParameters = {}
+
+  for (const name of url.searchParams.keys()) {
+    queryStringParameters[name] = url.searchParams.get(name)
+    multiValueQueryStringParameters[name] = url.searchParams.getAll(name)
+  }
+
+  return {
+    body: null,
+    headers: {
+      Accept: '*/*',
+      Host: url.host,
+      'User-Agent': 'bugsnag aws lambda test',
+      'X-Forwarded-Port': url.port,
+      'X-Forwarded-Proto': 'http'
+    },
+    httpMethod: 'GET',
+    isBase64Encoded: true,
+    multiValueHeaders: {
+      Accept: ['*/*'],
+      Host: [url.host],
+      'User-Agent': ['bugsnag aws lambda test'],
+      'X-Forwarded-Port': [url.port],
+      'X-Forwarded-Proto': ['http']
+    },
+    multiValueQueryStringParameters,
+    path: url.pathname,
+    pathParameters: {
+      proxy: url.pathname.replace(/^\//, '')
+    },
+    queryStringParameters,
+    requestContext: {
+      accountId: '123456789012',
+      apiId: '1234567890',
+      domainName: url.host,
+      extendedRequestId: null,
+      httpMethod: 'GET',
+      identity: {
+        accountId: null,
+        apiKey: null,
+        caller: null,
+        cognitoAuthenticationProvider: null,
+        cognitoAuthenticationType: null,
+        cognitoIdentityPoolId: null,
+        sourceIp: '127.0.0.1',
+        user: null,
+        userAgent: 'Custom User Agent String',
+        userArn: null
+      },
+      path: '/{proxy+}',
+      protocol: 'HTTP/1.1',
+      requestId: '96b29547-f073-41b7-98f0-96040733b229',
+      requestTime: '01/Dec/2022:08:55:43 +0000',
+      requestTimeEpoch: 1669884943,
+      resourceId: '123456',
+      resourcePath: '/{proxy+}',
+      stage: 'prod'
+    },
+    resource: '/{proxy+}',
+    stageVariables: null,
+    version: 1.0
+  }
+}
+
+function makeAwsLambdaContext () {
+  return {
+    awsRequestId: 'f0d6ee94-8baa-46bc-a4fe-22bf52a1fb28',
+    callbackWaitsForEmptyEventLoop: true,
+    functionName: 'ExpressFunction',
+    functionVersion: '$LATEST',
+    invokedFunctionArn: 'arn:aws:lambda:us-east-1:012345678912:function:ExpressFunction',
+    logGroupName: 'aws/lambda/ExpressFunction',
+    logStreamName: '$LATEST',
+    memoryLimitInMB: 128
+  }
+}
diff --git a/packages/plugin-aws-lambda/test/session.test.ts b/packages/plugin-aws-lambda/test/session.test.ts
new file mode 100644
index 0000000000..1bfc2664c4
--- /dev/null
+++ b/packages/plugin-aws-lambda/test/session.test.ts
@@ -0,0 +1,122 @@
+import Client from '@bugsnag/core/client'
+import Session from '@bugsnag/core/session'
+import type { Plugin } from '@bugsnag/core'
+import BugsnagPluginAwsLambdaSession from '../src/session'
+
+describe('plugin: aws lambda sessions', () => {
+  describe('without server plugin', () => {
+    it('can start a session', () => {
+      const client = createClient()
+
+      expect(client._session).toBeNull()
+
+      const shouldNotBeCloned = client.startSession()
+
+      expect(shouldNotBeCloned).toBe(client)
+      expect(client._session).toBeInstanceOf(Session)
+      // @ts-ignore
+      expect(client._session.toJSON()).toEqual({
+        events: {
+          handled: 0,
+          unhandled: 0
+        },
+        id: expect.any(String),
+        startedAt: expect.any(Date)
+      })
+    })
+
+    it('can pause and resume a session', () => {
+      const client = createClient()
+
+      expect(client._session).toBeNull()
+
+      const shouldNotBeCloned = client.startSession()
+
+      expect(shouldNotBeCloned).toBe(client)
+      expect(client._session).toBeInstanceOf(Session)
+      const expectedSession = client._session
+
+      client.pauseSession()
+
+      expect(client._session).toBeNull()
+
+      // resumeSession should not clone either
+      const resumeSessionClient = client.resumeSession()
+
+      expect(client._session).toBe(expectedSession)
+      expect(resumeSessionClient).toBe(client)
+    })
+
+    it('does not clone the client with resumeSession if there is no active session', () => {
+      const client = createClient()
+      const cloned = client.resumeSession()
+
+      expect(cloned).toBe(client)
+      expect(client._session).toBeInstanceOf(Session)
+    })
+  })
+
+  describe.each(['express', 'koa', 'restify'])('with server plugin (%s)', serverPlugin => {
+    it('can start a session', () => {
+      const client = createClient(serverPlugin)
+
+      expect(client._session).toBeNull()
+
+      const cloned = client.startSession()
+
+      expect(cloned).not.toBe(client)
+      expect(client._session).toBeNull()
+      expect(cloned._session).toBeInstanceOf(Session)
+      // @ts-ignore
+      expect(cloned._session.toJSON()).toEqual({
+        events: {
+          handled: 0,
+          unhandled: 0
+        },
+        id: expect.any(String),
+        startedAt: expect.any(Date)
+      })
+    })
+
+    it('can pause and resume a session', () => {
+      const client = createClient(serverPlugin)
+
+      expect(client._session).toBeNull()
+
+      const cloned = client.startSession()
+
+      expect(client._session).toBeNull()
+      expect(cloned._session).toBeInstanceOf(Session)
+      const expectedSession = cloned._session
+
+      cloned.pauseSession()
+
+      expect(cloned._session).toBeNull()
+
+      // as there is a paused session, resumeSession should NOT clone again
+      const resumeSessionClient = cloned.resumeSession()
+
+      expect(cloned._session).toBe(expectedSession)
+      expect(resumeSessionClient).toBe(cloned)
+    })
+
+    it('clones the client with resumeSession if there is no active session', () => {
+      const client = createClient(serverPlugin)
+      const cloned = client.resumeSession()
+
+      expect(cloned).not.toBe(client)
+      expect(cloned._session).toBeInstanceOf(Session)
+      expect(client._session).toBeNull()
+    })
+  })
+})
+
+function createClient (serverPlugin: string | null = null) {
+  const plugins: Plugin[] = [BugsnagPluginAwsLambdaSession]
+
+  if (serverPlugin) {
+    plugins.push({ name: serverPlugin, load: () => true })
+  }
+
+  return new Client({ apiKey: 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa', plugins })
+}
diff --git a/test/aws-lambda/features/fixtures/serverless-express-app/app/app.js b/test/aws-lambda/features/fixtures/serverless-express-app/app/app.js
index 939dc28bbd..0d29fed98f 100644
--- a/test/aws-lambda/features/fixtures/serverless-express-app/app/app.js
+++ b/test/aws-lambda/features/fixtures/serverless-express-app/app/app.js
@@ -11,7 +11,7 @@ app.get('/', (request, response) => {
 })
 
 app.get('/handled', (request, response) => {
-  Bugsnag.notify('no crashing here')
+  request.bugsnag.notify('no crashing here')
 
   response.json({ message: 'did not crash :)' })
 })
diff --git a/test/aws-lambda/features/promise-rejection.feature b/test/aws-lambda/features/promise-rejection.feature
index 858a494be2..ba35a91f8d 100644
--- a/test/aws-lambda/features/promise-rejection.feature
+++ b/test/aws-lambda/features/promise-rejection.feature
@@ -83,5 +83,4 @@ Scenario: promise rejections are reported when using serverless-express
     Then the session is valid for the session reporting API version "1" for the "Bugsnag Node" notifier
     And the session "id" is not null
     And the session "startedAt" is a timestamp
-    And the event "session.events.handled" equals 0
-    And the event "session.events.unhandled" equals 1
+    And the event "session.events" is null