TiVo Roamio Netflix streaming lag

Within the last couple of weeks, my TiVo Roamio lags badly while streaming Netflix. The stream will ramp up to 1080p (5 - 7MB) and periodically drop down to 240 (0.15 MB) for a bit, then ramp back up. I had initially written it off as internet issues but finally decided to test the problem. I streamed the same shows from other devices on the network, all other devices stream 1080p flawlessly with no interruption or lag. The TiVO is wired to the router and the TiVO Netflix app reports...

TiVo Roamio Netflix streaming lag

TiVo Roamio Netflix streaming lag