Same thing happens to me.
My device is MacBook Pro 16, 2019
After updating to macOS Big Sur, I noticed a few changes that can be improved:
My batter life shrinks from 5hr to less than 2hr.
It gets hot more easily.
This is an important issue that should be solved as soon as possible !
Thank You !
laurentroussel
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution