I have reported it to Apple.
Sony STR-D750 receiver
Samsung UN55 something 4K TV
Apple TV 4K
No longer able to turn the receiver and TV on and off in sync with waking and putting the Apple TV to sleep, using the Apple TV remote. Volume on Apple TV remote no longer controls receiver volume.
Sony STR-D750 receiver
Samsung UN55 something 4K TV
Apple TV 4K
No longer able to turn the receiver and TV on and off in sync with waking and putting the Apple TV to sleep, using the Apple TV remote. Volume on Apple TV remote no longer controls receiver volume.