[Webkit-unassigned] [Bug 243586] New: Video shifts on screen when interacting with the pointer

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=243586

            Bug ID: 243586
           Summary: Video shifts on screen when interacting with the
                    pointer
           Product: WebKit
           Version: Other
          Hardware: Mac (Apple Silicon)
                OS: macOS 12
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: kkinnunen at apple.com
                CC: webkit-bug-importer at group.apple.com

Video shifts on screen when interacting with the (mouse) pointer

See the test case as an attachment.

To repro:
- Move the mouse anywhere on screen with a gentle gesture
- Observe video shifting positions slightly

Gentle gesture is a mouse pointer move gesture, trying to move only few pixels.
One can also try to scroll few pixels upwards, this may cause the video shift. After the shift, normal pointer move will shift the video back.

Does not occur when recording the screen.

See the radar for a recording captured with an external device.

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