Just a shot in the dark, but have you confirmed with the game off that the flipper is free to travel and the spring is properly attached? The flipper could be tightened too far up the shaft without proper clearance between it and the playfield/bushing. Return of the flipper, as far as I know, is completely up to the spring tension and the flipper having clear/smooth travel.

I just fixed the same thing on my buddy’s LE. They had the flipper cranked down too tight to the mini-playfield.

Sadly, I've only played one Munsters and it didn't have the lower playfield. I'm determined to find one that does because either it or Deadpool will likely be my first Stern game. But flippers are pretty standard across most modern games as far as functionality so should be fairly simple either adjusting the bat position on the mechanism or making sure the spring is attached. Likely it's the former as it wouldn't really return without the spring. Marco actually gives you a little tool that sets the "slack" but I would think it's about the same distance as the height of a dime or so. Just loosen the hex screw that holds the bat shaft into the flipper mechanism and raise it up a bit (putting the coin between the playfield and flipper) and tighten down. Make sure the bat stays in alignment with the holes or marks on the playfield.

Had a similar issue on 2 new Sterns, easy fix, it was mechanical. Adjust the flipper, fixed my issues .

Same thing happened to my game also and it ended up being the screws had come loose on the metal bracket that holds the flipper coil and it was letting it cock just enough to put it into a bind and make the flipper hang up so check and see if those screws are loose.

Ah yes, another good suggestion. Make sure all the screws are tight!

Are they stock flippers, mine are yellow? I adjusted the level of my flippers after putting in a PF protector as the same thing was happening. Def flipper not set at the right level. Take the mini PF out (4 screws & 3 plugs), loosen flippers put a cr card under & tighten again.

TNT Amusements just released a video about this on YouTube. The lower playfield plastic they think swells from the heat while shipping inside the box and the tech used #6 washers to raise the plastic just slightly off the flippers. Check out the YouTube video. Super easy and permanent fix.

Ours did same thing right out of the box...a simple fix with washers! Start watching at the 3:25 minute mark to see how to fix it fast!

Thanks guys!

This post helped me address the issue in my new Munsters premium.

Steve