Freezing Regularly

For months now, we experience freezing on MSNBC and Padres channels. There may be others, but these seem to be the most problematic.

We have Contour 4K modems for the TV’s with strong signals. Rebooting helps, but the issue returns after a few hours.

We have a high-end system with Cox 2gig Internet, 8K and 4K TV’s, and strong WiFi connectivity.