content-visibility: auto; makes CLS go bananas

[zeemawn]

Hi, I've already posted this as an issue in the web-vitals repo but got referred here 🙂

GoogleChrome/web-vitals#108

It seems like by using the new content-visibility: auto; the measured layout-shifts keep increasing while the user scrolls the page, even though the shifts are happening outside the visible viewport - is this a desired behavior?

The reported CLS-values can easily get to 1 and above just by scrolling down the page (even though for the user everything looks fine and non-jumpy).

[yoavweiss]

There was a Chromium implementation bug that was fixed. Do you still see an issue in e.g. Chrome Canary?

[skobes-chromium]

Let's use crbug.com/1164942 to track this issue.