Netflix poor quality

Has anybody seen poor/inconsistent picture quality on Netflix Tivo app in the past several weeks? My Roamio ethernet is hard wired to a 10Gbps switch, and ISP speed is 65Mbps. Other devices on the same switch see full port speed and full internet speed. However, Netflix quality is extremely variable. Starts out ok, then drops very low every few minutes, then back to good quality. Used to be good for hours at a time in months prior.

If I watch the same exact program on a Fire TV stick over...

Netflix poor quality

Netflix poor quality