[Jukebox-list] Seeburg R tonearm / trip issue

I’m working on a R that just came in. As the tonearm enters into the cutoff portion of the record, instead of tripping off the tonearm jumps back into the record and then repeats this process and eventually will trip. There is a good loop in the tonearm wire so no bind there. Previous owner had installed an adapter to use stereo cartridge but I don’t think there’s any issue there. Could the tonearm balance weight cause this?