Airplay from Mac

[lundqvist01]

Yesterday I set up my new Bravia X90J and I'm generally very happy with it, so far. However, I can't get AirPlay to work properly when using my Mac. 

What doesn't work:

1. When using Quicktime Player on the Mac and selecting to airplay to the Sony TV using QuickTime Player, the vide window says "This video is playing on "Sony TV" and the TV switches to the Airplay input window, as expected. However, the playbar isn't moving and no video (nor audio) is displayed.

What does work:

1. Airplay from my iPhone works without issues.

2. Airplay my entire desktop from the Mac also works (but with the usual lag that makes movie watching less than ideal).

Is this a known bug? Can someone reproduce it? I'm running Monterey and the TV is updated to the latest software versions. 

Quicktime Player on the Mac after selecting to Airplay. Playbar isn't moving and Play/Pause does nothing.