Displayed chat markers are only sent for messages received while the chat does not have focus

I stumbled upon this while trying to improve my MDS MR…

Versions

• Gajim version: 1.9.2 (but I don't think this is new)

Steps to reproduce the problem

1. Open a chat in gajim (direct or MUC)
2. Wait for a message in this chat while keeping the focus on gajim window

Expected behavior

Gajim should send a displayed marker here.

Actual behavior

It does not.

More info

Sending <displayed> markers only occurs when the chat is out of focus when receiving the message, and giving this chat the focus afterwards. It corresponds to the situation where there's an "unread count bubble" disappearing.