Dsfix problem (Dark Souls)

I decided to re-run here the other day, installed - dsfix, dsmfix, I set everything up, everything is fine, but I ran into unpleasant garbage, this was not the case before, after some time (10-20 minutes, in different ways) fps from 60 sags to 30 and all, for the life of me, you have to restart the game. I already set up this dsfix this way, it's still the same story. Is it treated somehow?