MGM 16018 Cutting out at 1/2 to 3/4 throttle

Yea it is set up for 3s Lipo.
The battery was fully charged.
It will run at half throttle no worries, It is just when you give it full throttle the motor cuts out.
Bring it back to half throttle or less and it is away again.
It sounds a bit strange. Just thought I might of missed something in my programing.
(Programing by transmitter)
I have it programed to cut the motor off at low voltage but the battery still has 11.7V left in it.

Any more ideaa are appreciated.