Been testing this in the UK for watching Live TV via an Apple TV client.
It works OK during my testing but I am noticing it takes quite a bit longer to change channels compared to the current stable:
Current stable: Around 4/5 spins of the spinning circle
Beta: Around 10 spins
Not sure whether you can speed it up or not, if you need logs let me know.
Can you please grab your PMS logs and share the zip file?