Brick hammer, nextui, FF causing lag?

Im running into an issue with Pokemon PureRBG, where I ff pretty often to rush leveling/combat, traversing areas and dialog. Ive also used rewind but havnt had that happen after rw. Not sure if its a rom or a os issue. Its not in a consistent spot.

The issue itself looks like its slowly down and the sound is very laggy/jumpy until it freezes. I can still shutdown normally but my data isnt saved