My TV started constantly losing its WiFi connection and after trying all the standard stuff I finally dug into the system logs on the WiFi router to determine that the router was sending control commands to tell the TV to upgrade from the 2GHz to the 5GHz band and when the TV didn't respond appropriately, the router would deauth it for some stupid reason.

I can only assume something changed in the TV firmware because I haven't upgraded my WiFi firmware in 6 months.

So I found the config to disable "smart connection upgrades" and now everything is stable. I can't imagine how frustrating it would be for a normie without deep networking knowledge to run into this bullshit.