This has happend, I open a room for everyone and as soon as I join my own room and invite someone from there to join me at my second room we can see room 2 but everyone who is in room 1 is still inside it. Take a look at this screenshot. I can see everyone and everyone can see me. One someone is sitting at something it looks as if they sit in the air. And they see me sitting in the air or inside a wall as soon as I use something in the room I see at that moment. When a dev needs some more to know just write me I will try to explain more so you can reproduce it.