I just had to quit a flight while doing a pattern at LEMD in the A320 due to an issue with the A320 speed AP. Pretty annoyed. I slowed down to 140kts, a reasonable speed in the 320, with flaps full. The whole flight the speed AP had been overzealous, the aircraft did not want to maintain its speed for anything and so the AP was constantly going up from 0% to 100% every few seconds, and the aircraft was pitching up and down. It was getting worse so I disengaged the AP and tried to fix it using manual throttle and it still didn’t help. Thinking maybe it would sort itself out after that, I re-engaged the AP and it sent me into a stall. Exited flight before anything else could happen.
Note I can’t share the replay as whenever I go to export it my app crashes.