Regarding the 2nd last page: No, his ability has no limits. The only reasons why something could threaten him are his simp powered stupidity and incredibly powerful foes that somehow negate the time stop.
"Hey guys! Some psycho tried to murder me just now for no real reason in the broad daylight in front of a crowd. Instead of doing anything logical I decided to prostrate in front of her and apologize."
-MC in this chapter