I was doing a long haul from LEMD-MPTO last night and the A330 ended up stalling out of the sky, which subsequently made me receive 4 system violations for overspeeding. After reviewing the replay footage I did indeed stall but I don’t see a reason why as I believe my aircraft weight was ok and the rate at which my aircraft was ascending during the step climb was ok and not too high. I believe there has been some type of glitch or something along those lines.
Below I will provide images of the flight during the step climbs and the reduce in speed as well as a link to the replay file.
The aircraft started to lose speed around 7:10 however the vs was 500 which I don’t find to be too steep.
Once the aircraft started to step climb to FL400 at 8:12 it was climbing around 400fpm which I still don‘t think is too steep for an a330 to step climb at.