I also have now the problem that I don't receive messages.
All people to whom I open a new chat get my messages I can see their status like ...is writing a message... but I never receive something.
This happens to Apple and to Android users. Sailfish users I don't have.

The only place where I can still receive answers is within groups. strangely.

I tried shutting down the app including disconnecting, restarting the phone etc. nothing helped.

Additional Info: I also see that the app constanly loses the connection. Should I send the log? or can I somehow reset the app somehow?