It's still unclear tbh.
Gaban used AdCoC but Sommers was regenerating next chapter.
Damage ain't permanent
It might relate to just how much haki you're using
Joyboy did say he used his most powerful haki
Perhaps the amount you output depends the duration of the affect
if that's actually the case, then Joyboy's haki was so strong it survived centuries, whereas Scoppers only lasted a few moments