Describe the bug
Mentions (@ sign) and likes (heart) remain until I refresh the page via F5. Sometimes F5 doesn't help either.

To Reproduce
Steps to reproduce the behavior:

1. They answer me in a group and mention my name.
2. I open this message and read it.
3. Opening another group
4. I see that the @ icon in the left list remains in the line with the channel name.
5. I refresh the page via F5, the @ icon still remains. Sometimes it disappears after refreshing the page.

Expected behavior
The @ icon should disappear after reading the message.

Screenshots

Desktop (please complete the following information):

• OS: FreeBSD 14.1
• Firefox 132

Additional context
I have been observing this problem for a very long time, perhaps about a year.
Today I even managed to catch two @ icons. Although only 1 person in the group answered me.