Maybe the engine is a little bit excited, for opening the 'h' file/activating the h8 rook, after getting some 3 (!) minor pieces for the queen. Or he/she/it (the comp.) simply failed to find a much more interesting continuation 
A best move in analysis.
Sort:
So, I just played a game where my opponent is probably having a bad day as they are playing bad.
When I finished playing the game and opened analysis. Where I found a weird best move.
Black to Move.
The best move is predicted to be hxg5, but I have a Nf6+ to capture queen. Why is hxg5 the best move?