Diablo 2 Resurrected PS4 Problems

Hey everyone, I face the problem in Diablo 2 Resurrected on my PS4 that with longer fights my ps4 crashes and i loose every progress i made. It happened with Diablo, the ancients and now Baal. I will try tonight again on Baal but fear that i wont be able to finish the chapter.

Does anyone face similiar problems and/or knows how it can be solved? Im trying first to delete everything unnecassary on my memory.

Thanks JK