Mike,

I just switched to the UFly combo in July and experienced exactly what you described. It seemed to coincide with taxiing over bumps so I thought it was the plane's wiring/spiking, but once I changed the battery the problem was resolved.

Note: even though on the headset I still had a green light (not sure if it was flashing or not, definitely not red)
indicating a good battery, replacing the battery fixed all the cutouts.

Hope this cure helps,
Cubdrick