if you get stuck on the joining screen, you can try escaping and rejoining again, but you shouldn't always get stuck
could you elaborate on the repeating backgrounds issue?
Viewing post in Can't join online servers anymore
Unfortunately I tried several times and the game stayed in this room every time I tried to access to servers.
About the background repeating, generally the backgrounds are normal when I create a level (no repeats), when I export the level and play it (outside the level editor), this is where backgrounds 1 and 2 repeats. The files for the backgrounds are not the same if you look at the room files, its probably mod.json that is doing something wrong.