Any mp3 I open with Audacity 3.2.3 on my Mac Monterey 12.6.2 plays too slowly, with lots of buzzing, then within a second or two stops. It is possible that it is looping a miniscule portion of the file; it’s hard to tell.
These mp3s (commerically made, like from Amazon, or homemade, from ripped CDs or even old recordings from cassette deck) play fine in Quicktime and Apple Music. Editing with ffmpeg in the Mac terminal works as expected, meaning the files change and are still playable in QT and Music. But no adjustments made elsewhere have corrected playback in Audacity.