Mamba Max Cogging

Interesting, I have a rustler with MM esc and 5700 motor and then I also have a 1/8 buggy with MM esc and Neu 1512 (2200kv). I get the same stall/stutter on the rustler as I do with the 1/8 buggy. Only difference is that the rustler only stall/stutters for a second then it will take. The 1/8 buggy you have to return to neutral then throttle it again. This is only an occassional quirk btw, I can get it either one to do the stall/stutter if I go full throttle, brake to a full stop, over and over and it does it 1 out of 6 times on the rustler and more on the the buggy. I wonder if it is more of a weight issue. I'm probably a little over geared on the rustler.