The more I read, I'm starting to think I'm finally seeing the "brown out" savox is notorious for. Never experienced it before but it would make sense that I never saw it with the 10.5, or with the 7.5 at first but it popped up with a pinion change. I may have just blipped it over the edge of current draw for the internal BEC. Every time it happened I was either in the brakes for a turn or I the throttle exiting a turn. Sometimes it would come back in a few seconds like it had to clear its head, other times it would just freeze and choke on itself.
I'll try a capacitor if it does it again tomorrow, or drop that tooth back down hahaha.