RESOLVED WORKSFORME 236316
Rendering artifacts during animation 
https://bugs.webkit.org/show_bug.cgi?id=236316
Summary Rendering artifacts during animation
Jack Doyle
Reported 2022-02-08 10:46:58 PST
Safari leaves artifacts/chunks of animating element(s) during animation, as if the repaint bounding boxes are miscalculated perhaps? Here's a thread describing the issue and it includes a CodePen demo: https://greensock.com/forums/topic/30156-safari-v15-rendering-bug/ The CodePen demo: https://codepen.io/BrianCross/pen/wvqZPEq If you set will-change: transform it resolves the issue (but of course that shouldn't be necessary).
Attachments
Add attachment proposed patch, testcase, etc.
Antoine Quint
Comment 1 2022-02-08 11:39:15 PST
This appears to be fixed in STP 139 and Safari in macOS 12.3 Beta. Can you check on this Jack?
Jack Doyle
Comment 2 2022-02-08 12:02:20 PST
Indeed it does seem to be fixed in the update, thank you.
Antoine Quint
Comment 3 2022-02-08 13:04:53 PST
Thanks for filing the bug and verifying it!
Note You need to log in before you can comment on or make changes to this bug.