Join arena on Idle -> Finish idle level during arena game is end -> Start another idle level -> Finish arena game -> "Arena game in progress!" box still shown on top.

It might be not important bug, but notice box blocks current money/army status - a little bit annoying. Notice box is even not movable!

--- update @ 10h later
It seems fixed now, but it might happen again.

Edited 2025-05-20 15:08:26