Configuring preferences and options in Outlook.com
I can now confirm that Microsoft is supposedly aware of the issue (yet to publicly acknowledge on social media) based on the reply to my submission via the "Help" procedure I previously mentioned which reflects the cookie-cutter response that was given to the IA as well: https://answers.microsoft.com/en-us/outlook_com/forum/oemail-ofolders/junk-email-going-to-inbox/da8e531e-d9c8-4d16-a45b-ef53e6bf8095
I provided my correspondent with the requested information along with my question about their public acknowledgement.