Spektrum cutting out after jump

[gramey]

I just replaced the 2nd hand Spektrum receiver, complete with repaired aerial, in my 1/8th truggy with a brand spanking new one and now it cuts out when landing from a jump at the furthest point of our track, also the biggest jump.
Goes to failsafe and applies the brakes but causes problems not only for me but anyone behind me. Sytem comes alive again after a few seconds and drives fine for the remainder of the lap until I get to that jump again.
Any ideas peeps?