Does this happen primarily in most SRB1 remake levels, most SUGOI
levels, or most official levels (besides the SRB1 remake)?
The SRB1 remake mostly uses Midi music, the SUGOI levels often(/only?) use "VGM" music (like Midi, except for various console sound chips), and most non-SRB1-remake official levels use Ogg music (and maybe one or two MP3s?), so knowing this would likely be beneficial for debugging. (Other custom levels with custom music some times use Midi, some times "VGM", and some times Ogg/MP3 music.)