When I come down in the mornings, I notice that the machine is still on (you can hear and feel the machine) although the standby red light is on. I switch the machine on and off minutes later and the machine then powers down and goes into proper standby mode. This happens every morning whether or not a programme is recording during the night.
Are you turning off the hub at night. I had this problem until I read that the box updates its self at night through the internet. If you leave it connected to the internet over night, the box will turn its self off by morning. This another silly bug that Humax as put in these box’s.