Quoted from zaphX:Do you happen to have the scoop Cliffy installed? If so, there is a tab on it that eventually breaks (it happened to me recently) causing the entire protector to act like a spring and prevent the ball from hitting the switch
I do have a Cliffy scoop protector. The bends have relaxed a little it seems but that doesn’t seem to be the issue. I pushed in on the tab to make it tight to the underside of the playfield with a ball in the scoop and the switch still didn’t register.