some messages are not shown in chat when long polling

[mahibi]

send many messages from web to android (while being in the chat on andoid) on android, check if all messages are shown that were sent

This happens on UI handling. Messages are even added to adapter but some are not shown.

it also fails with 20.0.2 sometimes, but feels like it got worse with newer versions..

• [ ] check if this only happens when messages are sent quite fast one after another