As daft as it sounds these new hubs are sensitive to electrical interference mine has drove me nuts and it turned out the pump on my heating system was on its way out. So every time it kicked in the box reset changed the pump moved the box well away from anything electrical never had a problem since.
Interesting Rick, I did think about this and mentioned it to the engineer on the last visit.
The router is sat on the desk, behind the LCD monitor, next to a sonos controller and NAS. I'm thinking of elevating it to a shelf or something similar.