emulator breaks when trying to load a save file

[fass_scass]

(in fire red rev 1) I can load the rom and play normally with a constant 60fps and about 300 when fast forwarding as usual

however, when trying to load a save file, the game simply freezes. Audio still plays, but the game runs at 30-40 fps with increased cpu usage and the game is completely frozen with no way of playing it. This didn't happen before, and the only thing that I assume could've changed something is the fact that I recently started using a DS emulator in this same PC. When trying to reset the rom after trying to load a save file, a blank, white screen appears with no audio playing whatsoever and no keys work