No, the angel will possibly do it again. what it is doing is eating the tiny "eyes", the small appendages at the very tips of their arms, they are not suckers but eyes and apparently they are tasty.
When they grow back the angel may bother it again. It can be fatal over the long run for the star being always harassed, but in my experience the fish usually end up leaving them alone.
it has always been high summer temps that have done mine in, they always seem to start melting when temps hit ~82