So.. probably a rare occurance but.. i bugged out when i joined a party...
Basically they just finished kiling a boss and either they were on the boss tile or just before.. i joined the party there and then. My character kept going round in circles. The leader then couldn't move for some reason so i left the party.. 2 simultanious battles happened, the first one was overwritten by the second one. I killed the mobs on the second one and got stuck in the battle screen.. walking around it. I had to teleport out.
A rare thing to happen but it did. It happened in the giant robot thing.. the boss before CPU.