On player A’s turn, their Unown Q uses quicken, which blocks effects of attacks done to Unowns during Player B’s next turn. When Player B uses Dark Crobat’s surprise bite pokemon power, Unown blocks the pokemon power from doing damage. This is what seems to be an incorrect function, as Unown Q only blocks effects of attacks, not pokemon powers.
Did you report using the in game function? I can’t find an email with a game log. Even though the integration with the forum is broken, devs are getting your bug reports. Please include a game log if you wish to manually report here. It helps a lot with recreating the bug accurately.