Element refuses to consider a room read

[bjherbison]

Steps to reproduce

1. Visit https://chat.mozilla.org/#/room/#firefox:mozilla.org .
2. View a message https://matrix.to/#/!OjiTSQTpPWGpfDenKT:mozilla.org/$5UsDgcRFAc56OKwhFLa1tctVj0S17PWOCVcOtuqc6lo?via=mozilla.org&via=matrix.org&via=privacytools.io which starts a thread.
3. View the thread. Scroll to the top and bottom of the thread.
4. Leave the room.
5. Enter the room again.
6. View the thread list -- only one thread has a dot, the most recent.
7. Scroll to the top and bottom of the thread.
8. Leave the room again.
9. Enter the room again.
10. In the room menu mark the room as read.
11. Leave the room again.
12. Enter the room again.
13. In the room menu mark the room as read.
14. Leave the room again.

Outcome

What did you expect?

After reading everything the room had an unread count of zero and no threads marked as having unread content.

What happened instead?

The room showed up as having two unread messages until after the second time I selected Mark as Read. And then a minute later, while composing this message, the room now has two read again. And the thread has a dot again.

Operating system

Linux

Browser information

Firefox Nightly

URL for webapp

https://chat.mozilla.org/#/room/#firefox:mozilla.org

Application version

Element version: 1.11.30 Olm version: 3.2.12

Homeserver

https://chat.mozilla.org/

Will you send logs?

Yes

[t3chguy]

Closing in favour of #24392