Airplay Video to New Samsung TV Keeps Stopping

I have a brand new Samsung Q60A 2021 Smart TV which supports Airplay but I'm having disconnection issues from my iPhone 12

TV and Phone set up on same network. Phone and TV set to allow/discover devices on same network

Try to send video to TV. I get the Airplay setting on the TV prompting for a code which is set to first time only. I enter the code on the phone and the video starts to play fine. But it will then randomly disconnect and TV shows the AirPlay screen again. Sometime this is after a minute or sometimes up to 10 mins. If I resume the video on the phone it starts from the beginning.

Powered off/on and Reset the Router

Powered off/on and Reset the TV

Reconnected the phone to TV again

Set Up AirPlay code again

Still have the same issue. Nothing else using the Network at the time, one other devices connected (printer)

Photo's and Screen Mirroring seem to work fine, just video having issues.

Any Suggestions? Samsung Support contacted and they're saying it's an Apple issue.