If the element's parent has position=fixed and perspective styles, it won't inherit parent's position=fixed style unless it has CSS transform style. Steps to reproduce: 1. Open the attached test files and try it on latest Chrome or Opera. 2. Scroll the scrollbar. Expected results: 1. The green element is fixed in the window. Actual results: 2. The green element isn't fixed in the window.
Created attachment 209018 [details] perspective demo
I am unable to reproduce this bug using the demo code from attached and changing it into JSFiddle: Link - https://jsfiddle.net/56b2suo0/show In Safari 15.6, I see "green" box with "red" tilted square and when scrolled, they remain on same place, which matches wit all other browsers (Chrome Canary 106 and Firefox Nightly 104). I think it was fixed along the way and this can be marked as "RESOLVED CONFIGURATION CHANGED". Thanks!