Auto-plunge still working perfectly, but something new crept up. I checked the thread and haven't seen anything for it yet. My top-right gate is acting up. It no longer stops the ball and puts it in the pops when it should. During Sabretooth Battle when hitting the left loop (Dazzler), the ball would hit the lowered top-right gate and fall in the pops for battle damage. Now it just makes the Prem loop back to the right flipper. The gate doesn't lower.
It also crops up on the plunge or right loop (Domino) shot. If I hard plunge without holding the left flipper, the ball will sometimes hit the top-left gate and bounce hard enough to go back down the shooter lane. The top-right gate doesn't come down again. The same thing can happen with a clean right loop shot. The ball whips around the loop, hits the top-left gate and rebounds to the right. Gate isn't down, so the ball will sometimes fall back into the shooter lane.
During Berzerker Rage, the gate does seem to lower, but I need to do more play-testing to be sure.