"Some of your messages have not been sent" message appears every time I open element

[Zachinquarantine]

Description

Whenever element restarts or I open the client, the "Some of your message have not been sent" issue shows up. (as pictured below)

When I hit "Delete", my latest message gets cropped lengthwise:

When I hit "Retry", or go to another room and then back to that chat, it disappears, but the ! logo remains.

Steps to reproduce

• open element desktop
• look at the bottom of the chatroom you closed it in
• you will see that message there
  Describe how what happens differs from what you expected.
  There should be no "your messages didn't send" message because I never sent any messages in the first place.

Logs being sent: yes

Version information

• Platform: desktop

For the desktop app:

• OS: Windows
• Version: 1.7.30

[Zachinquarantine]

sent logs

[turt2live]

2021-06-07T18:05:02.711Z E Cannot set read marker to a pending event ($redacted-0)
Error: Cannot set read marker to a pending event ($redacted-0)
    at F.setRoomReadMarkers (vector://vector/webapp/bundles/6f5c25b49711cab9c570/vendors~init.js:2:544428)
    at e.sendReadReceipt (vector://vector/webapp/bundles/6f5c25b49711cab9c570/vendors~init.js:2:1859667)
    at e.updateReadReceiptOnUserActivity (vector://vector/webapp/bundles/6f5c25b49711cab9c570/vendors~init.js:2:1866006)

this is the theme

[novocaine]

Possible duplicate of #17078

[Glandos]

I got the same after a messy call (no Element call), and the "Delete all" button generate this:

Uncaught TypeError: e is undefined
    decryptEventIfNeeded client.ts:7772
    getEvents TimelinePanel.tsx:1731
    reloadEvents TimelinePanel.tsx:1684
    Kd TimelinePanel.tsx:925
    emit events.js:158
    emit typed-event-emitter.ts:89
    t ReEmitter.ts:55
    emit events.js:158
    emit typed-event-emitter.ts:89
    updatePendingEvent room.ts:2829
    updatePendingEventStatus client.ts:4854
    cancelPendingEvent client.ts:4419
    removeFromQueue Resend.ts:64
    cancelUnsentEvents Resend.ts:42
    cancelUnsentEvents Resend.ts:41
    _ RoomStatusBar.tsx:145
    React 11
    unstable_runWithPriority scheduler.production.min.js:18
    React

How can I generate more useful logs?