Quoted from supermoot:
One of my flippers has been sticking up on Hollywood Heat. The actuator has worn a groove into the new eos I installed less than a year ago. It gets hung up a little. I fixed it temporarily by wiggling the stack to a different angle. Anyone see anything like this happen before? Is the switch metal just too soft?
Very common problem when we were operating Gottlieb pins back in the day.
Like you did, rotate the switch stack a little to use a new spot on the EOS leaf. Put a dab of super lube on the spot to reduce friction/wear.
You can always add a blank leaf blade to you existing switch stack to get a fresh surface.