Always be concerned, but I normally will not pull the fish unless there are open wounds and or torn fins. A single chunck out of a fin is not enough for me to pull one.
Noting the above:
If the fish does not get a chance to eat, does not show any sign of submitting, and the female is relentless over a few days, I pull them.
Did the new addition even make and attempt at submitting?
fwiw: I have not had any of my clarkii complex species lip lock, but I have only had a few so that is very anecdotal.