I don't see the video icon in my teachers' call in our class. Reloading the app, restarting the phone/connection it doesn't work. I was at call when my classmate started the call then I immediately out because they press the call for themselves, the teacher should make the call not them. Then I gave feedback, then after that. I don't see video icon for calls anymore. I did everything yet it doesn't work. My classmates tried to invite me but it doesn't work cuz it says that I was already there.