Speed passion reventon r help

[dje]

Hi guys I've just updated the firmware on my reventon r to stock 1 so it now has the hybrid boost active , the problem I now have is at full throttle ie hybrid boost it cuts off to what could only be described as limp home !! If I switch the ESC off and on again it goes fine again until you go full throttle , I've reset the end points and re calibrated the ESC still the same , I've checked all the settings that are recommended on the speed passion website for the motor etc on the ESC and they are correct I re installed the firmware still the same , it's got the low voltage cut turned off and the thermal protection turned off ! I changed the sensor lead no change , if I move the EPA setting on the handset to 90% it's fine just no boost , I raced last Tuesday with it straight out of the box and had no problems whatsoever ,it just wasn't quick enough ! it's just since I've tried to use the hybrid boost for a bit more power that it's playing up , I'm using a V 3.0 7.5R motor that came with the speedo , any help much appreciated I'm just a bit confused