Apologies for my late reply.
I am running the following at the moment on my Inspire Pro X5R
App 3.1.15
Aircraft version 1.9.1.30+
RC Version 1.7.60
Camera Version 1.9.1.10
A9 PLUS version 01.15.18.09
I have no issues selecting channels manually at all. in fact my live video feed ran amazingly...