I have checked all timers, I have tried every setting and turned off auto updates as thought it could be related to it searching for an update around this time.
I have updated all software, on the TV, the stage and the app.
I had some Sony Linkbud S headphones hooked up to the TV for listening late at night, as this is in our bedroom, so even more annoying when the thing turns on, and deleted them from the TV and thought it had sorted it, but after a couple of nights of peace it started doing it again.
If I unplug the hdmi it doesn't happen. That can be repeated.
I have reset the stage but doesn't help.
I saw on a couple of other posts saying the same but no conclusion.
Any ideas?
Thanks.