I got a surprise firmware update on my old (2016 I think) Sony Android TV just a couple of days ago. It still seems to be 7.0 (but with the Android security updates for 1st August 2018), but had some fixes for HDR I think.

Apart from the perrenial bug of system menu sounds still coming from internal speakers even when a soundbar is connected, I'm now having issues casting YouTube videos from my phone to my TV.

The YouTube app on the TV itself is fine, and works 100% of the time, but trying to cast videos from my phone to the TV results in the TV just staying on the YouTube loading screen (and the phone reports it's trying to connect). I did manage to clear the cast app data and cache, and that fixed it, but the issue has come back less than 24h later.

Has anyone else got this? This was absolutely not a problem previously (it's a feature we make extensive use of).It definitely arrived with the last firmware (which of course I can't downgrade from).