Screen seems to freeze at the moment round 2 is supposed to start. This happens in Treasure hunt, Sealed Ninja, Arena & SA from what I have found out. Many people in our server cluster have reported this happening to them. This makes doing everything that needs fights either hard or impossible.

Same here, fights freezing in round 2, rebooting pc or restarting client doesn't help. Nor does clearing cache etc etc Arena can be done, although it is tedious bc you have to start over many times. SA however, is impossible to do, keeps freezing every single fight.
S327

Hello, the game is experiencing a lot of errors with battles after the maintenance, this is being addressed and should be fixed shortly! Sorry for the inconvenience.

Now when I tried sealed, game froze in middle of round 1. So doing fights before round 2 starts might not be enough.

This error should be fixed by now, is anyone still experiencing it?

solved, thanks