MP3 playback issues

I use Audacity mainly for fun, taking some songs I like and re-pitching them. I use MP3 files for this, and I noticed after updating to the 3.1 version, the playback mix sounds strange, the bass sounds very quiet.
This isn’t an issue with my headphones or my interface, I listened to the songs on Youtube and on Spotify and they sound perfectly fine. is there an explanation to this, and if there is, is there a way to solve it?