Hi,
The issue with the Q10pro sometimes not switching off correctly seems to be related to the HDMI CEC feature, if its enabled in your TV or AV receiver. Switch off the Q10Pro first, waiting for it to switch off completely before switching off your TV and AV receiver then there is no issue. It appears that the Q10Pro has issues with HDMI CEC, especially if the TV or AV receiver is switched off first.
Regards
David