diff --git a/.circleci/config.yml b/.circleci/config.yml
index e364e3bf665..f91484c1257 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -48,12 +48,12 @@ jobs:
       - checkout:
           post:
             - git fetch --all
-      - restore_cache:
-          name: Restore Yarn and Cypress Package Cache
-          keys:
-            # when lock file changes, use increasingly general patterns to restore cache
-            - yarn-packages-{{ checksum "yarn.lock" }}
-            - yarn-packages-
+      # - restore_cache:
+      #     name: Restore Yarn and Cypress Package Cache
+      #     keys:
+      #       # when lock file changes, use increasingly general patterns to restore cache
+      #       - yarn-packages-{{ checksum "yarn.lock" }}
+      #       - yarn-packages-
       - run:
           name: Install Dependencies
           command: yarn install --frozen-lockfile
@@ -107,12 +107,12 @@ jobs:
           post:
             - git fetch --all
 
-      - restore_cache:
-          name: Restore Yarn and Cypress Package Cache
-          keys:
-            # when lock file changes, use increasingly general patterns to restore cache
-            - yarn-packages-{{ checksum "yarn.lock" }}
-            - yarn-packages-
+      # - restore_cache:
+      #     name: Restore Yarn and Cypress Package Cache
+      #     keys:
+      #       # when lock file changes, use increasingly general patterns to restore cache
+      #       - yarn-packages-{{ checksum "yarn.lock" }}
+      #       - yarn-packages-
 
       - run:
           name: Install Dependencies
@@ -143,12 +143,12 @@ jobs:
       - checkout:
           post:
             - git fetch --all
-      - restore_cache:
-          name: Restore Yarn and Cypress Package Cache
-          keys:
-            # when lock file changes, use increasingly general patterns to restore cache
-            - yarn-packages-{{ checksum "yarn.lock" }}
-            - yarn-packages-
+      # - restore_cache:
+      #     name: Restore Yarn and Cypress Package Cache
+      #     keys:
+      #       # when lock file changes, use increasingly general patterns to restore cache
+      #       - yarn-packages-{{ checksum "yarn.lock" }}
+      #       - yarn-packages-
       - run:
           name: Install Dependencies
           command: yarn install --frozen-lockfile
@@ -237,11 +237,11 @@ jobs:
           post:
             - git fetch --all
       # Use increasingly general patterns to restore cache
-      - restore_cache:
-          name: Restore Yarn and Cypress Package Cache
-          keys:
-            - yarn-packages-{{ checksum "yarn.lock" }}
-            - yarn-packages-
+      # - restore_cache:
+      #     name: Restore Yarn and Cypress Package Cache
+      #     keys:
+      #       - yarn-packages-{{ checksum "yarn.lock" }}
+      #       - yarn-packages-
       - run:
           name: Install Dependencies
           command: yarn install --frozen-lockfile
@@ -346,7 +346,9 @@ workflows:
           record: true
           store_artifacts: true
           working_directory: platform/viewer
-          build: npx cross-env QUICK_BUILD=true APP_CONFIG=config/dicomweb-server.js yarn run build
+          build:
+            npx cross-env QUICK_BUILD=true APP_CONFIG=config/dicomweb-server.js
+            yarn run build
           start: yarn run test:e2e:serve
           spec: 'cypress/integration/common/**/*,cypress/integration/pwa/**/*'
           wait-on: 'http://localhost:3000'
@@ -372,7 +374,9 @@ workflows:
           record: true
           store_artifacts: true
           working_directory: platform/viewer
-          build: npx cross-env QUICK_BUILD=true APP_CONFIG=config/dicomweb-server.js yarn run build:package
+          build:
+            npx cross-env QUICK_BUILD=true APP_CONFIG=config/dicomweb-server.js
+            yarn run build:package
           start: yarn run test:e2e:serve
           spec: 'cypress/integration/common/**/*,cypress/integration/script-tag/**/*'
           wait-on: 'http://localhost:3000'
@@ -403,7 +407,9 @@ workflows:
           yarn: true
           store_artifacts: false
           working_directory: platform/viewer
-          build: npx cross-env QUICK_BUILD=true APP_CONFIG=config/dicomweb-server.js yarn run build
+          build:
+            npx cross-env QUICK_BUILD=true APP_CONFIG=config/dicomweb-server.js
+            yarn run build
           # start server --> verify running --> percy + chrome + cypress
           command: yarn run test:e2e:dist
           cache-key: 'yarn-packages-{{ checksum "yarn.lock" }}'
@@ -480,7 +486,9 @@ workflows:
           yarn: true
           store_artifacts: false
           working_directory: platform/viewer
-          build: npx cross-env QUICK_BUILD=true APP_CONFIG=config/dicomweb-server.js yarn run build
+          build:
+            npx cross-env QUICK_BUILD=true APP_CONFIG=config/dicomweb-server.js
+            yarn run build
           # start server --> verify running --> percy + chrome + cypress
           command: yarn run test:e2e:dist
           cache-key: 'yarn-packages-{{ checksum "yarn.lock" }}'
diff --git a/platform/core/src/classes/MetadataProvider.js b/platform/core/src/classes/MetadataProvider.js
index 51a16b6fe7b..c1517468e40 100644
--- a/platform/core/src/classes/MetadataProvider.js
+++ b/platform/core/src/classes/MetadataProvider.js
@@ -4,6 +4,7 @@ import dicomParser from 'dicom-parser';
 import getPixelSpacingInformation from '../utils/metadataProvider/getPixelSpacingInformation';
 import fetchPaletteColorLookupTableData from '../utils/metadataProvider/fetchPaletteColorLookupTableData';
 import fetchOverlayData from '../utils/metadataProvider/fetchOverlayData';
+import validNumber from '../utils/metadataProvider/validNumber';
 
 class MetadataProvider {
   constructor() {
@@ -284,7 +285,7 @@ class MetadataProvider {
 
         break;
       case WADO_IMAGE_LOADER_TAGS.VOI_LUT_MODULE:
-        const { WindowCenter, WindowWidth } = instance;
+        let { WindowCenter, WindowWidth } = instance;
 
         const windowCenter = Array.isArray(WindowCenter)
           ? WindowCenter
@@ -294,15 +295,17 @@ class MetadataProvider {
           : [WindowWidth];
 
         metadata = {
-          windowCenter,
-          windowWidth,
+          windowCenter: validNumber(windowCenter),
+          windowWidth: validNumber(windowWidth),
         };
 
         break;
       case WADO_IMAGE_LOADER_TAGS.MODALITY_LUT_MODULE:
+        const rescaleSlope = validNumber(instance.RescaleSlope);
+        const rescaleIntercept = validNumber(instance.RescaleIntercept);
         metadata = {
-          rescaleIntercept: instance.RescaleIntercept,
-          rescaleSlope: instance.RescaleSlope,
+          rescaleIntercept,
+          rescaleSlope,
           rescaleType: instance.RescaleType,
         };
         break;
diff --git a/platform/core/src/utils/metadataProvider/validNumber.js b/platform/core/src/utils/metadataProvider/validNumber.js
new file mode 100644
index 00000000000..be9630afa79
--- /dev/null
+++ b/platform/core/src/utils/metadataProvider/validNumber.js
@@ -0,0 +1,9 @@
+const validNumber = val => {
+  if (Array.isArray(val)) {
+    return val.map(v => (v !== undefined ? Number(v) : v));
+  } else {
+    return val !== undefined ? Number(val) : val;
+  }
+};
+
+export default validNumber;