just sent message is not always added to chat view

[r10s]

sometimes, a just sent message is not shown the chat view (it is not only not scrolled down).

leaving and re-entering the chat shows the message and the message is also sent as expected.

i do not know how to reproduce that, but that happens to me every day, so maybe for 1 of 50 messages.

also, i can say that the issue is quite new, i noticed that the last weeks.

[cyBerta]

I wonder if that could be related to a missing event in core?