I'm having this exact same problem with all three flippers on my STTNG.

If I hold the flipper button and then apply force by hand I can get to the point where it's kicking.

It's bad enough that if a ball rolls down and hits a flipper hard enough it can go all the way back up the playfield.

I've done a flipper rebuild on my two bottom flippers but nothing on the top.

Not sure about this resistor between the terminals, I don't seem to have one. Any more info on that?

Cheers

Clancy