[Webkit-unassigned] [Bug 239582] New: iOs 15.4 CSS transition flicker with transform and opacity

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=239582

            Bug ID: 239582
           Summary: iOs 15.4 CSS transition flicker with transform and
                    opacity
           Product: WebKit
           Version: Safari 15
          Hardware: iPhone / iPad
                OS: iOS 15
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: codyzhao at canva.com

Safari (iOs 15.4.1) has troubles displaying CSS transitions with transform and opacity when only one transition delay given for the two, like `transition: opacity 400ms ease-in 50ms, transform 600ms ease-in`.
Adding transition delay of 1ms to transform stop the flicker. e.g. `transition: opacity 400ms ease-in 50ms, transform 600ms ease-in 1ms`

This bug didn't exist for earlier iOs versions.

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