Have you tried 2.4 ghz wifi to see if the same symptoms occur?
I have not. I will look into it, but again, this should not be happening. A search makes it seem like it's a known issue, and no one is trying to resolve it. Very frustrsting, and not a good look for Samsung.
I have also not tried a cable. While it may solve the issue, it shouldn't be needed. Especially since it has only recently started happening.
I agree with you about not having to use the cable especially because It's wifi capable.
I have two Samsung tvs and I just hope this doesn't start happening with the second one.
It's very frustrating.
How long have you had this TV and how long have you had these symptoms?
The next step would be service, you can use the link below to find a service center in your area.