Ditto headphones, Gear S3, Bluetooth speaker no probs.Works fine with anything I’ve paired it with. My headphones, wireless speaker and LG Watch all keep a consistent connection.
If BT 5 is backwards compatible, and it works fine with older phones, and sometimes works, well, seems like it is the N8. Sometimes it works in the car, but not others. Sometimes it sees my Polar HR strap, but most of the time does not. And if you look at this thread, which is 13 pages long now, clearly, there is an issue for a lot of folks. https://us.community.samsung.com/t5/Galaxy-Note-Phones/Note-8-Bluetooth/td-p/163424
The bluetooth on your N8's just does not work most of the time.
My N8 hooks up most of the time without any problem. BUT, after maybe 10 seconds or less, it will crackle, disconnect, pause and then reconnect. After that happens (and it happens every time) it stays connected just fine. My first N8 was so slow that I took it back to Best Buy and the Geek Squad tested it on their Wi-Fi and said it was definitely defective (7.4 mbps D and .4 up!). Cost me another $200 for a replacement cuz #Samsung warranty sucks!
The bluetooth on your N8's just does not work most of the time. Doing a search for this issue, I found many seem to be having the same issue on the N8. Sometime it sees my BT devices, others it does not. So, are others having the same issue?