strange working servo after initialisation zyx-s

[bassman]

I fly my trex 500 for a while now with the zyx-s controller.
Flies very good.
Yesterday after startup i wanted to fly but on spoolup the heli was tilting backwards when giving pitch.
After checking i saw that rear servo was not responding or a little bit on stick input.
When disconnecting the battery and connected it again everything worked fine and i had a good flight.
I checked the initialisation procudere after the flight 10 times and it did not occur again
.

What could be the cause of the bad initialisation of 1 servo?

[Steve Joblin]

It might be your transmitter glitched with your receiver during the binding process.

[jbilliter]

Search the forums. The zyx-s on some firmware revs and some servos had this problem.
Solution was to downgrade the firmware.