XR15 Remote w/ Yamaha AVR problem

My XR15 remote is paired to my Yamaha TSR 5790 receiver and an RCA 4K TV. Cable box is XG1v4, plugged into TV's hdmi, TV to receiver audio us using optical.

Power, volume work as expected, but pressing the Xfinity menu button intermittently switches audio inputs on the receiver after a couple of seconds (from the correct AV1 input to the incorrect AV1 input, which I've set to "skip" in the receiver's options, but the XR15 remote still switches to it. Frustrating.