https://www.amazon.com/SiliconDust-LPF-608M-Filter-Antennas-Standard/dp/B08QDWP43V

There is a cheaper Phillips one too. I havent tried it This completely resolved the issue where a channel would be fine and then periodically pixelate.

I didn’t know this had become a thing u til I watched this

https://www.youtube.com/watch?v=YUx8IBkeW4A

I’d just accepted this interference as a part of tv since the stations were moved around

Silicon Dust (makers of HD Homerun) make these also, and I use them. Seem to work (and is the "Amazon Choice" for these products, meaning it gets few returns).

https://smile.amazon.com/SiliconDust-LPF-608M-Filter-Antennas-Standard/dp/B08QDWP43V

Amazon also sells a Phillips model for half that price ($10 rather than $20--Channel Master is $25).