Created attachment 469073 [details] Testcase In the attached example, the text does not end up getting to the bottom of the grid. This is because we are not properly flexing the track. Gecko and Blink both end up aligning the text to the bottom of the grid Removing the "contain: size" style creates the expected rendering.
<rdar://problem/119736473>
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/43719
Pull request: https://github.com/WebKit/WebKit/pull/21995
Committed 272276@main (57fdd17822df): <https://commits.webkit.org/272276@main> Reviewed commits have been landed. Closing PR #21995 and removing active labels.