attached is the midi file I'm using. When using the example player on http://grimmdude.com/MidiPlayerJS/, around 1/4 of the way through the sound starts getting very weird and everything sounds out of sync and static-y. I tested just the soundfont player somewhere else and I got the same bug, so it is an issue with the soundfont player rather than grimmdude's Midi Player.
https://files.catbox.moe/l409f2.mid
attached is the midi file I'm using. When using the example player on http://grimmdude.com/MidiPlayerJS/, around 1/4 of the way through the sound starts getting very weird and everything sounds out of sync and static-y. I tested just the soundfont player somewhere else and I got the same bug, so it is an issue with the soundfont player rather than grimmdude's Midi Player.