MMP spektrum sr300 question....

[hootie7159]

hey guys....quick question but first here's my setup:

hyper 10sc geared 42/14
novak 4.5 HV 5mm motor
mmp stock settings except (30% drag and 6.0v to BEC)
dx3e and sr300 tx/rx
s300 servo
running 2s 30C tunigy 5200mah lipos

my truck works fine and is perfect for the 1/10 scale track i run on and it hauls booty...however, i ran into an issue when i initially tried to run it...the power to the rx would cut out going from a dead stop to full throttle...i know its a bec problem but all i did was add a glitch buster (cap in the aux slot in the sr300) and it fixed the problem...Is this common with the mmp's? or do i need to send it in to get fixed?....it works fine with the power cap but has issues without the cap....