Apple TV Remote changes Sony TV input when clicking Back or Menu button

This is a very sporadic (once a week) but annoying bug that starts happening after switching from a different input (video game console, Blu-Ray player etc), and back to the Apple TV.

The only way to resolve this is to restart the Apple TV, which makes me assume that the fault is on the Apple TV, not with the TV.

The irritations compounded by the fact that to get to the Restart menu option, you need to click the Back/Home buttons multiple times, which changes the TV input each time.

The Apple TV and Sony TV are both updated with the most recent OS/firmware. The TV model is a Sony BRAVIA XR A80J.

Has anyone else encountered this? It's possible to avoid this issue entirely by turning off the TV control features to change power and volume with the Apple TV remote, which I don't want to do. I would rather live with this irritation than have to use the TV remote to change volume when watching Apple TV content.