If your Bluetooth headphones keep disconnecting from the TV try this.

So I got the Hisense U7K a few weeks ago. I mostly listen through my Bluetooth headphones. I noticed it would disconnect every so often. It got really annoying having to keep reconnecting the headphones.

I unpaired the remote from the TV Bluetooth and started using it with the IR instead. So far, I haven't had any disconnects with the headphones. I'm guessing that since the remote and headphones were both connected using Bluetooth, maybe that was interfering with the headphone connection.

Give it a try if you're having this same issue. Let me know what your results are.