I've started to experience some bugs where the AI appears to move to one space, but actually moved to another (sometimes with a different card). It's impossible to tell if it happened without refreshing the game every time the computer moves; the only time it was obvious was one time when the computer moved to an off-grid spot.

It didn't happen for a long time, but lately this bug occurred at least once in perhaps half of my last 6-8 games. Maybe once every 10 or so computer moves.