Unread indicator never clears for some thread

[mightyiam]

Steps to reproduce

I don't know how to reproduce.

Outcome

What did you expect?

The unread indicator for any thread to disappear when I open it.

What happened instead?

The unread indicator for a specific thread never clears.

Some observations that may be relevant:

• The thread is in a DM room.
• That room has two threads.
• That thread is the more recent one.
• The last message in the room is deleted.
• The thread is started from the message that is previous to last.
• The earlier thread is started from the message just prior to that.
• The room is encrypted.
• The thread doesn't seem to have any messages with reactions.
• The thread has some voice messages.
• The last message in the thread is a text message by the other user.
• The one previous to that is a text message by me.
• The last message in the thread is marked as seen by the other user.
• The DM room was created by the other user.

It is unlikely that thread will ever see more messages, if that helps.

Operating system

NixOS 24.11.20240920.a1d9266 (Vicuna) x86_64

Browser information

Firefox 130.0.1

URL for webapp

https://app.element.io/?updated=1.11.62#/room/!zgqAHuqAyuGAtOuHMm:matrix.org

Application version

Element version: 1.11.77 Crypto version: Rust SDK 0.7.1 (c8c9d15), Vodozemac 0.6.0

Homeserver

No response

Will you send logs?

Yes

[dbkr]

This could be a good specific case of a stuck notification. Thanks for the detailed description of the context, we can try to reproduce this and see if we can track down the issue.