hey the only time i have had a similar thing happen with a tekin combo was when one of the power wires had a dry solder joint on the esc. i have a mamba monster setup as well but have never really had a problem with that. one other problem i had with the tekin was the servo was drawing to much current and the bec in the rx8 wasn't coping so it would shut down the rx for a few secs but i don't think you would have that problem with a mamba i fixed it on the rx8 with rx cap.