Hello,
I know how to reproduce :
Invite friend(s) to come in your lobby, while he/they is/are loading, launch a map, as he/they is/are still loading the map vote will be bypass, bubble opens. Go to chest to open one of them,… if at the same time you are in the inferface, your friend(s) get to your lobby (finished to load) you get stuck.
No chest animation, no chest anymore, no button to quit, no key to quit but ALT F4. Or your friends pushing you to the bubble for the game get starting 
No way !
How it looks :
Thanks for acknoledging.