Unread Symbol appears even if there is no unread message

[Wishmaster172]

Avoid duplicates

• [X] I have searched the issues tracker for a bug report similar to mine, in vain

Steps to reproduce

Nothing special to do, just wait...

Debug link

https://debug.getferdi.com/d5d3dbde-b2e5-4c43-83d0-fd1b66c40281

Screenshots

Additional information

No response