I'm on Debian + KDE Plasma 5 and the tray icon disappeared, the UI froze for no obvious reason, sometimes only the frame of the windows was visible while the rest was a black square, notifications were hit and miss, sometimes the mic wasn't released after a voice call and I had to restart pulseaudio to free it and sometimes the client couldn't detect the audio devices at all.

I believe it has to do with my configuration, but I never had the same problems with the Teams client.