Hey! I have the same issue for about a week. I'm going crazy ... After hundreds of pairings, cleaning if IR sensors.on both TV and inside the remote, it doesn't work untill I'm perfectly in front on TV. I moved a bit the soundbar, and removed it, just to test, it's not really better.
Sometimes when I pair the remote, it's better because it doesn't use the IR, maybe the Bluetooth connection you're talking about, but after a few minutes or seconds, I can see the IR LED light when I press a button, and remote becomes almost unusable...
Help would be appreciated!
I was never able to figure it out! I got in touch with Samsung Support but they were absolutely useless. I think the remotes sold with this television are faulty. The only work around I've been able to figure out is to use the Smartthings app and use my iphone as a remote for the television. Another poster on here described going through 3-4 remotes with the same issue.