Communication: Group channel message in thread showing twice

[FelberMartin]

On the Android app, when opening a thread a sending a message, the message is shown twice in the thread. On the WebApp however, the message is only shown once, so this only seems to be a local issue with the Android app, and does not affect the other apps.

When testing the same in a 1:1 chat, this behaviour did not occur.

I have not looked into it, but it may be related to #70
UPDATE: After a short investigation, this issue seems to be unrelated to the later PR.

Screenshot