NAIM ATOM Shutting Down

Hi

My NAIM ATOM has suddenly decided to shut down (sleep) after about 5mins

I am playing Amazon Prime via HDMI into the ATOM

The same thing happens when I am watching a Prime Movies and when I think about it also BBC Radio 5 sports app on my TV. I was listening to the match last week and I had to press the NAIM control every 5 mins to keep it awake. Any ideas what is happening or better still how do I fix it ?

What socket are you using on your TV?
eARC HDMI?
Sounds like the TV is switching off the Naim via the HDMI.
Does it switch off when normal streaming on the Atom itself?

Yes, eARC HDMI

It does not switch off when streaming from my iPad, at least I don’t think it does, I’ll need to test