I've got t he same issue. My SX20 does not recognize that I have a camera connected, however the camera works fine in calls (it transmits without a problem).
I'm running ce 9.9.0 81e20f9808a 2019-06-29
Precision 10x cam
By the way, my remote control works via IR to control t he camera (PTZ) but will not control the codec at all.