When facing didonko in the beginner league he got an appalling hand and eventually gave up, conceding the whole match to me. Unfortunately he did this by quitting the current game during the end of my turn.
This caused a glitch in that, as my turn had ended, the space bar and end turn button wouldn't work, while the timer was reset and believed it to be my turn. I ended up having to wait the whole thing out.
While uncommon and not a big deal, I still feel this needs reporting.