I'm reluctant to give advice without confirming the diagnosis lest we fix a problem that doesn't exist, but keeping even pressure while maintaining a consistent loaded rod is the goal. When they jump, specially if most of that 1/2 oz lure is outside the mouth, it's a bit of a crap shoot, I like to keep them from jumping in the first place, but if they do, keep just enough pressure for the lure not to swing loosely, sometimes easier said than done.