I was getting the same thing but it was BattleEye kicking me, until I uninstalled BattleEye and then reinstalled it again it hasn't kicked me like that before.
I think it may be your connection to the server.
I sometimes get disconnected from the server and the worst time to disconnect is when you're half way through making a theme or symbol
and you get kicked. I don't want to put the blame on LO and their servers but with high ping and the current game as it is, I don't think it's
a good combination at this point in time.