After group call ended number of unread messages don't disappear

[binford6000]

Steps to reproduce

1. Group call is ending an NO MESSAGE was written afterwards
2. Number of unread messages appaer under the chat name and won't be marked as read
3. With the next chat message written in the chat the unread messages disappear.

Expected behaviour

After the call ended and all messages are read the number of unread messages disappears.

Actual behaviour

Number of unread messages is shown:

After writing something into the chat the unread messages count disappears: