Thanks, yes this I know, and it was set to Enhanced already. I see how my reply could've been confusing, I was speaking in terms of trying to turn the AI Upscaler off entirely, and "Basic" was the only option that was closest to "Off" without having that option.
It does seem like it has something to do with the Surround Sound setting on mine, as I haven't noticed the issue shown in the video above once it was disabled. It's a shame that it has to be off, but it's not the biggest deal. Had my fingers crossed that it was some obviously noticeable bug that could be addressed via diagnostics, but I'm not feeling good about it now.