A few weeks ago, Lemmy started using Service Workers, which Chrome associates with an origin (e.g. https://lemmy.world/) instead of a specific tabId.
IPvFoo had been ignoring these requests, which resulted in a lot of missing data. I just pushed v2.7 to the Chrome Web Store, so Lemmy should show a 4/6 again when it's published in a day or two.
The old version still sort of works if you Ctrl-Reload the page.
The best practical use!