IMO that’s not the case; people are having the disconnect message when they are trying to open a conference, that is, 2 connections (and more often it’s when there is 3 connections). Crashing by just entering a room is not so common.
absolutely not; are you trying to access Jitsi by having a X11 session in the container ? I use standard X11 sessions or a phone, my containers are on an internet server (outside my personal network)
to access peripherals such as webcam or microphone from a browser you must be in a secure session, that is, TLS. You should have a certificate, even if it’s a self signed certificate for an internal access.