Most Stars have starspots (Former Crashed Comets or: Interference Black Holes see: Q-FFF Theory) A Pulsar has huge mass, but Black Holes DONT, SO: they have a Different reaction during the exploding former star. B1509.
Not only starspots but even ball lightnings are tiny interference black holes ( Q-FFF Theory.) see: What is wrong in Physics: https://vixra.org/pdf/2101.0131v2.pdf
Former Starspots tend to form new dual BH Herbig Haro systems to form smaller stars, or dim stars. See : Interesting difference with the HANDS of God: forming black holes in the middle instead of a massive Neutron star.
There seem to be two sorts of black holes (string based black hole knots) Supernova and Tiny magnetic interference black holes ( ball lightning up to Comets) below;