ORIGINAL: sav-e-o-so
Can it be that the failsafe is still set to my nitro.
DING DING DING DING ! We have a winna ! When you set the failsafe for nitro you set it too full brake , so when the RX goes into failsafe mode thats what gets sent too the ESC which = a full throttle take off if you lose signal or turn off the TX .
Re bind the transmitter and receiver but this time leave the throttle at neutral while you bind them .