Hey @Wayne (live.com#ankonaskiff17)"),
I'm glad you're able to warn others about potential Bluetooth problems they may encounter; as we've all found, different users have different experiences, and it's good to have a group of people (us!) who are here to help.
I should note that not all users will "see" the same (Win10) "Your Phone", and that goes for all facets of it. For example, I have Win10 1909 (build 18363.836) paired to a Samsung Galaxy S7 Edge (running the Samsung provided Android 8.0). Using the app, I can neither see nor control the phone's screen, nor does it use any Bluetooth connectivity; however, from what I've seen, later Samsung phone models allow you to do things that the "lesser" models (such as mine) don't.
In my case, my solution was to keep the phone's WiFi off (when sending messages through the Win10 app), but obviously there's more to it than just that (depending on your exact hardware, OS, etc).
Best to all -- stay safe and sane!
Dave