I get this - it's similar to the "stuck chord" that used to happen with the midi triggers (at least for me). My fix was to disable combat music because I don't care for it anyway. Not sure if I was using the new combatheme mp3's or not - it's been disabled for years.
On that note, have you tried replacing/moving the music files?
https://www.project1999.com/forums/s...d.php?t=181286
-Mcoy