Keep in mind that this phone is the first to use the Bluetooth 5.0 standard. It wouldn't be unusual for devices that are first to market with a new technology to also be the first to run up against unexpected problems. Hopefully Samsung will patch this since even though it's not impacting most people, that thread on Samsung support shows its impacting many, not just the OP. For me, the only thing I'm seeing is it not automatically connecting to my car as consistently as previous Samsung phones did when I'm already connected to my LG Tone headset. This is not a big deal for me. It's also not something the iPhone 7 Plus was able to do at all in my case, or for that matter the OnePlus 3t or LG V20. The only two recent phones that did this well for me were the S7 Edge, and the Pixel XL. But that again doesn't mean the issue isn't real for many people.
Yep, that's exactly what I've been thinking since this thread began and heard about others with BT issues. New chip + New technology= New issues. Samsung being the first one with this will only mean that we are going to be the beneficiaries of this new tech but also means that we may easily be the Guinea Pigs of it.
For me everything has been great since the beginning, all my BT devices have worked even better than before with all my previous phones and it wasn't until yesterday that I experimented for the first time what it seems to be a glitch.
I was at the beach all day, and I left a bag with all my things on it, including the phone. I took with me to the water just my Gear S3 and I was still at reach with my phone so I kept receiving notifications and everything else, but when I began moving around and swimming and using my swim goggles I understandably got disconnected and reconnecting a lot, at one point I thought that it was going to be easier just to put my watch on Airplane mode as the sound/vibration of it every time it lost and got connection again got very annoying, but I never did it and then when I got out of the water and went my back to my things I noticed that the watch was on Standalone mode and never again reconnected.
After some watch and phone reboots and no changes I decided to go to the Gear App and I noticed that it was asking me to pair a phone, just like the initial settings, so when I went to my Bluetooth settings I noticed that there was no BT devices connected or remembered, so in a summary somehow it deleted all my BT connections.
No big deal for me as I just did all connections again including the watch but nevertheless a weird experience, so what could have caused this? I don't know, maybe just the amount of times connecting and disconnecting triggered some weird glitch causing it, but definitely it remembered me what I just mentioned at the beginning of this post, new tech means just new issues. At least in my case it was not that big of a deal, but I sure do understand if people with more serious BT issues complain about it.