One thing that just crossed my mind. last summer racing indoor offroad. i noticed my buddy's tekin kept shutting down and powering back up and his esc was coming off at over 160. he was running a high voltage servo and it was overworking the built in bec. my servo is not a high voltage servo, but it is meant for a 1/8 E-buggy (which i use it in every summer) maybe the rx8 bigger bec can handle it but not the rs. so when i hit the brakes and turn its causing it to over work? but i do regular after race temp checks. i average esc 90* give or take and motor 143-140* just throwing out ideas in text till i think of something