Take the rubber off

i thought there was a code update to fix that

There is a support note on Stern's website that addresses various possibilities -- Service Bulletin #130.

For this flipper the rubber should be pushed to the BOTTOM of the flipper, right at the table level. Otherwise it ends up pushing the ball back into the hole when it rotates.

Replace the rubber of the driven wheel mounted on the mini flipper shaft underneath the playfield first. It's a 1" or 1-1/8" standard playfield rubber, preferrably in black. This friction will allow the most torque to be transferred from the drive motor to the driven wheel.

Later,
EV

I had this very same problem as of Friday.

I though the old black 1" rubber was too dry and was not providing enough friction for the gears to grab onto each other. I tried the white 1" ring and it did not help. In fact, what happened is that it was sliding onto it own gear.

I solved this by adding two narrow 3/4" long strips of 3M double sided exterior tape (the dark gray type) into the gear groove. This does two things. (1) it prevent the ring from slipping onto its own gear, and (2) it slightly increases the radius of the ring and increases the grab on the mini flipper gear.

I can't tell yet whether the fix is going to last, but so far it works like a charm.

They had this problem out-of-box. Pushing the flipper ring down to about 1/16'' from the bottom is a permanent effective solution.

Glad Stern was reading my RGP posts back then...