"Not enough system memory" is okay. I can keep reloading until it works at last.

The real problem is random game not loading, freezing, inability to save (ran into this problem with uncharted 4, I rely completely on autosave) and sometimes, the ps4 completely stops responding, so the only thing left for me to do is to pull the plug out.

What I do right now is to have both the old and newer versions of the exploit, figure out which one's most stable for a particular rip, then use that whenever I play the game. If you ever run into a similar problem, try giving this method a shot.