I would like to know why as well. I tried it in 2.4.2, in 3.0.0, and in 3.0.2 RC02 with no issues - I am unable to duplicate the problem. Have you tried resetting your preferences: Tools > Reset Configuration or rebooting.
Since you shouldn’t be running production on 3.0.2, try it in 3.0.0 or 2.4.2. If you still have problems, try importing it with FFmpeg. see here: MP3 Decoding failed: Lost sychronization - #10 by steve
If that doesn’t fix it, try converting it to .AIF in VLC, and importing the .AIF into Audacity.
I hope this helps. 