Wicked paint reaction - why?

I have not painted in a long time and don't know about the new paints and primers
I have painted allot back in the 90'es and that looks like some one did not let the primer
cure or it did not get scuffed/sanded well, or good enough to let the primer release the . the.... heck I can't think of the word/name of what it holds in the primer that must be released before painted.. sorry I am old school, and yes this has happened to me before
with enamel and base coat/clear coat....... Did this happen after the clear was shot ?