idk, my ps4 pro on 5.05 keeps KP in intensive games like god of war/ghost of tsushima but my other ps4 pro on 9.00 is stable as a rock, no kp at all. and ps4 OG on 11.00 is stable in games as well.
Trust me I've tried everything on that 5.05 ps4 pro, changing thermal paste, changing hdd, even...