Z8 not returning to standby

Recently I've found my Z8 powered on when I get up in the morning. Sometimes it is after a program has been recorded overnight, other times not. Z8 power is set to Standby. CEC is enabled on my TV and AVR (required for ARC) but it is disabled on the Z8. This is a pretty big deal, since I am on a metered plan. Restarting or cold boot doesn't seem to help. SW is up to date.

Any thoughts? Or do I need to factory reset yet again? Wait until it happens again then send logs?

Thanks for reading and any replies.

Quote from SAM

Set your z8 to go into deep standby (power off) and test again.

I will, but of course that will disable recording AFAIK.

Quote from Hexagon

Turn off permissions for apps to wake up formuler box

Thanks for the reply, but no apps, even system apps, have that permission (at least visible). Only storage.

However, I may have solved the problem. I set the Z8 to record a program overnight, set it to "Power Off", and the program recorded normally... The box was also still powered OFF when I got up today.

I was under the impression that "Off" meant "Off" and no recording would occur?

Quote from SAM

The Box use smart recording. Means even if in this state, the box boot earlier and start Mol2 for scheduled recording.

Thanks, Sam, I didn't know. =b