Hi! That's really odd, could you tell us what were you doing before the issue? Were you in a normal level or in an arena with a single boss enemy? Do you remember how the enemies looked/which level was it? Did this happen after entering a whirlpool? Did this happen after you pressed "continue"?
We've only ever had this issue with loading a previously saved game, but that should be fixed. We haven't seen anything like this on our end, so any further information would help us a bunch :)