[spiderplant]

Very occasionally the V6 will come on to do updates, but not 3 or 4 times a week. Also V6 doesn't visibly power on to do recordings while in standby, so I think that can be ruled out.

I suspect it is picking up some stray IR noise in the room that is causing it to come out of standby. As long as your remote control is paired to the box, you can completely block the IR receiver on the box to eliminate any problem like this. It's in the shiny panel on the front - just block it with a piece of card or similar.

It would also be worth enabling auto power-saving, so it eventually goes back into standby in the event of something waking it.