Black Hole typically has a lot of "smack the glass" when the ball is travelling fast and hits the flippers hard. It's part of the game.

But - check the rubber rings on the flippers. Gottlieb flippers need the narrow rubbers to fit inside the groove on the flipper bat, and if you put regular ones on there (which happens quite a bit) it can cause ball jumps and other such nonsense as they don't seat evenly over the groove. If the narrow bands are in there, be sure they're properly seated.