I can't say for sure, but I think it's probably happening in only one spot. It seems like every time it happens and I need to backpedal to correct things my feet are always in the same position. But that's just kind of a gut feeling I get thinking back; like I said, I tried to recreate it on the repair stand for a while and couldn't get it to happen.

"Sounds to me like when you f'ed up your old chain, it did a number on some of your chainring teeth as well." I don't see that being the case, because the only reason anything happened to my old chain is because of this exact phenomenon. Whatever's "sucking" the chain to the ring happened first, then busted the chain. Not saying that didn't make the situation worse, but I don't think it started the problem.

Since this isn't chainsuck in the classical sense, and I'm not seeing any issues with just normal pedaling, anyone have any theories on what the issue is? Just some freak tooth misalignment that only shows up when shifting?