Sky Q Bugs?

[uncle al]

I've had a replacement box (after an installation in March)
The box was needing a re-boot twice a day and the Sky engineer said he was at a loss and replaced it
I've had differing opinions as to whether the box should be in eco, always on or the other mode (which escapes me)
The last couple of days the box has taken to reverting to 1080i despite being set to 2060UHD (I have a Samsung UHD TV), all by itself
Do you think this is also a bug??? ABers?