Logging in on a new device can replay stale Incoming Verification Requests which then get stuck.

[ara4n]

1. I logged into my main account fresh on Firefox
2. I got an Incoming Verification Request from Rick. He was confused, as he doesn't remember even sending it, so it must have been as while ago. I don't remember ever receiving it before.
3. I hit 'verify'; it showed the whole "waiting for your partner" thing
4. rick got no alert on his side.
5. i tried to close the spinner; it failed to close the dialog.
6. i was therefore unable to use the app and had to hit refresh.

[Insoleet]

We encoutered the same problem on a private E2E multi-users room. Only two of us (in a room of 4 people) got stuck with this window this morning. After refreshing the page, the window didn't show up again.

[ara4n]

see also #8807

[turt2live]

I think the X not working is https://github.com/matrix-org/matrix-js-sdk/pull/961/files#diff-0a3445e771f0c35ffee76e9d08b65e12R175