Telegram desperately needs to hire testers and someone to do proper QC. Call notifications don't appear until you restart the app, but ringtone is playing. Landscape video in calls is cut off, the quality gets atrocious at times with graphical glitches, i.e. the whole screen getting green. Just opening another app when on call drops the call after about 30 seconds. When you select a sticker the button to hide the keyboard doesn't go away and stays on top of the send button. The list goes on.