Engine gets stuck analyzing moves when practicing against computer.

Occasionally when using the practice against computer function in the practice tab, the engine will begin to calculate a move but freeze up with the text "Calculating moves..."
Reloading the tab temporarily fixes the issue, yet it resurfaces every so often.

It's happening to me all the time, doesn't change even when I refresh the tab. Been happening for two days.

Me too. Using chrome on Android.

For me it's when analyzing a game (I haven't tried practice against computer)