Glad your situation is resolved. I can't find a link or phone number to get to MS Support for W10 Mobile or Windows Phone. Can you share here?
My issue is with Garmin Fenix 5 smartwatch. Bluetooth will pair, but data is not transferred between phone and garmin connect app. Sometimes phone shows paired to Fenix 5, but app and watch say no connection. I used device recovery tool to roll back W10 mobile and now it works just fine again. But, the phone is prompting me to re-start to install the CU again. I'd rather not, but it seems I have to update. So, I need to find out how to resolve this bluetooth issue!