So, after I updated my Anki to 2.1.29, it would sometimes crash (stop working) in the middle of my review session. After a few times that this happened, I realized that it only occurred when cards that had a mpeg format audio appeared. It didn’t happen every time a card with mpeg appeared, but I would say around 40% of the times.
When I changed the audios format to mp3 it didn’t happen anymore, so I’m creating this topic in case anyone is having the same problem and don’t know why and to alarm about the problem. Thanks for reading! 
That’s interesting, thanks for the report.