[Webkit-unassigned] [Bug 263996] REGRESSION (iOS 17): Animation flicker with multiple accelerated animations and direction change

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=263996

Liam DeBeasi <ldebeasi at gmail.com> changed:

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--- Comment #3 from Liam DeBeasi <ldebeasi at gmail.com> ---
Created attachment 468449

  --> https://bugs.webkit.org/attachment.cgi?id=468449&action=review

Simplified test case

Here's a simplified test case so you can compare the behavior across browsers.

Steps to reproduce:

1. Open test case on Safari 17 for iOS or macOS.
2. Click "Run Animation". Observe that the square translates from the bottom of the screen to the top.
3. After 500ms, observe that the square jumps half way down the screen.
4. After another 500ms, observe that the square briefly flickers at the top of the screen before animating up from the middle of the screen.

I expect the square to not briefly flicker at the top of the screen in step 4.

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