My device is going trough my AVR (Denon x2600h) to my TV (Sony x950)I
set the Chromecast to 4k 60hz. It works (4K, Dolby Vision, Dolby
Atmos).After power Off, On it's back to 1080 60HZ.If I connect directly
to the TV there is no problem.
It's a bit strange that a device used to watch movies is not designed to
be connected to an AVR.Nowadays it's getting harder and harder to buy a
device that just works.There must be always some but ...