It's happening as a result of a deliberate animation. The CLS metric relates to initial render. So yes, there is layout shift, but it's not CLS per se.
reply> The CLS metric relates to initial render.
replyThe CLS measures the total sum of layout shifts over the entire lifespan of a page, not just during initial render.
The layout isn't shifting, so it's not a layout shift.
replyAnd it's not unexpected, because it comes from a css transition.
Sure.
replyIt's just that the spirit of Google's core web vitals has been to measure the properties of a web page that have the most impact on users. How quickly content appears on a page, how visually stable the content is, and how long it takes the page to respond to an interaction.
In the case of this page, I don't think it can be considered visually stable at all in the first second after it's loaded.
And yet, core web vitals cannot demonstrate this.