New
#400
Probably worth repeating here as it is directly relevant to this thread.
It's not necessarily an update, one that changes the installed files. If it is just a configuration setting that's needed, then that can be changed without applying any update that would be listed in update history.
One example is the banner at the top of Settings can be turned on or of remotely by Microsoft. Another was Start's 'expanding flyout' for Power, etc. that officially first appeared with 1909, that was A/B tested by Microsoft with it appearing on a few select 1903 machine, one of mine included.
And Microsoft's cryptic wording of the resolution in post #1 suggests that is the case here.
A 'non-managed device' means you and me, retail machines updated by Windows Update.This issue is resolved and should now be prevented automatically on non-managed devices. Please note that it can take up to 24 hours for the resolution to propagate to non-managed devices. Restarting your device might help the resolution apply to your device faster.