Earlier quoted context omitted.
This truly an antifeature.
Similar to PowerNap from Apple https://support.apple.com/guide/mac-help/what-is-power-nap-m... Although I don't think Apple recommends not keeping your laptop in a bag.
1) Looking at System Preferences right now, the setting for Power Nap reads as follows:
> [x] Enable Power Nap while plugged into a power adapter
> While sleeping, your Mac can back up using Time Machine and periodically check fro new email, calendar, and other iCloud updates
This indicates that it should not have any affect on a sleeping MacBook in a bag (presumably disconnected from power).
2) That said, I have on rare occasions found a former work-issued MacBook Pro to be hot to the touch when removed from my bag after a commute. I assumed this was some bug (not a feature), and I can neither rule out nor implicate the involvement of the nanny software installed by IT.