Mamba Monster cutting out at full throttle.....

I have a 12lbs converted savage that use with the following setup...

Mamba Monster
Feigao 7XL
zippy 4s 4500mah 21-35c

I have been using the Mamba monster's bec and ran fine for me, although I only got to put about 5 minutes of run time on it so far cause I broke a shock shaft, but thats another story. Anyways, when ever I grap full throttle it goes for about a 1/4 of a second and then it shuts off and I have to release the trigger to get it to go again. But if I slowly grap the throttle it powers up to full throttle fine with no hesitation or glitching.

Oh and my old setup that used the turnigy HV esc did the same thing if I geared up too high, but if I ran conservative gearing it ran smooth. I thought the turnigy ESC did this on high gearing because of over current as its only a 100 amp esc, but the mamba monster esc is supposed to be 200 amp and I cant imagine I am drawing that much current. My current gearing is 48T spur with a 16T pinion locked in second gear.

Anyone know why it is doing this or what can I do to make it stop?