I fly a 9ZWCII also and while I have not experienced that problem I have experienced the much less than stellar ability of the service center to diagnose any problem that doesn't smack them square in the face.
I had two of three R-149DP receivers go into intermittent function. They could not duplicate the failure and sent them back unrepaired with a note that they were out of warranty.
In the end I junked them because I could not afford the liability of using them in heavy iron giant scale.
You should have better luck than that since your transmitter is brand new. However sometimes it takes a little direct contact to gain a satisfactory resolution. What they think is a good job and doing the right thing doesn't always square with reality.