Line height explanation is unclear

I’m confused on line-height explanation described here.

Every subsequent line will have its leading added above, though. This is different than CSS where the leading would be split above and below, and different than Figma’s prior behavior of putting all the leading below

When I see Figma it looks working exactly same as CSS. (The leading split above and below. It’s called “half-leading” in that page.)
Can anyone explain what is different from CSS behavior?

Here is my example.