[Webkit-unassigned] [Bug 258945] New: [HTMLMediaElement ] currentTime shifts after updating playbackRate

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=258945

            Bug ID: 258945
           Summary: [HTMLMediaElement ] currentTime shifts after updating
                    playbackRate
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Mac (Apple Silicon)
                OS: macOS 13
            Status: NEW
          Severity: Enhancement
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mitelak at gmail.com

Setting a `playbackRate` causes unexpected shifts of `currentTime` when a video is playing in Safari. 

Example: https://codesandbox.io/s/currenttime-shifts-after-updating-playbackrate-zj27dd

To reproduce open the sandbox, play the video, and click the checkbox for auto playback rate changes. This example works smoothly on Chromium and Firefox, playbackRate change doesn't affect the currentTime. In Safari, the video's current time shifts to another value (sometimes goes forth, sometimes goes back) after changing the playback rate.

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