Big Sur "sleep" does not lock screen (when slept via keyboard shortcut) EDIT: corrected keyboard shortcut to say ⏻ rather than ⏏
I put my computer to sleep using cmd+opt+⏻ whenever I leave my desk.
For years, this has reliably locked the screen of the computer.
But ever since I upgraded to macOS 11 Big Sur: sleeping the computer does not lock the screen. I return to my computer later (minutes or hours), wake it up with the keyboard, and find that the computer is ready-to-use; no lock screen is presented.
Specifically, sleeping via keyboard shortcut does not lock it. Whereas sleeping by selecting &quot;Sleep&quot; with the mouse in the Apple menu seems to work.
My settings are the same as always:

I'm using a MacBook Pro (Retina, 15&quot; Mid-2014) on 11.1 Big Sur.
I have all the latest updates:

Is anybody else experiencing this? For my part, this is a security regression that has reduced my trust in macOS.
Maybe the settings got corrupted when upgrading to Big Sur.

Open System Preferences -&gt; Security &amp; Privacy
In the General tab, disable/untick &quot;Require password after sleep&quot;
Quit System Preferences to have the changed settings written to disk
Open the same panel again and enable the setting
Quit System Preferences (and hope for the best)