2 things, they can brown out and still have a servo work, I had it happen. But I think it may be a battery issue also. Gotta remember that a 50c 5000 battery does NOT deliver the same as 50c 7200 pack as its all relative to overall battery power. I personally would do both. get a glitch buster and a better/bigger battery. Any chance you could borrow a better battery from another racer to test?