Its a possibility but it still seems strong to me. I think Ive narrowed down the issue. On the atlas switches they use plastic tabs to attach to the arm that pivots. The rear truck somehow catches the inside tab (the side on the inside of the oval) and that's whats causing it to "hop". At least that's what I believe I am observing now running it in the regular direction again but it doesn't happen in the reverse direction.
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