[Webkit-unassigned] [Bug 213110] New: REGRESSION (r262124): Twitter videos go blank after exiting fullscreen

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=213110

            Bug ID: 213110
           Summary: REGRESSION (r262124): Twitter videos go blank after
                    exiting fullscreen
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Summary:
Twitter videos go blank after exiting fullscreen

Steps To Reproduce:
1. Load https://twitter.com/stephentyrone/status/1271230268762992642 in Safari
2. Take the video fullscreen
3. Exit fullscreen

Results:
The area where the video should be is blank.

Regression:
I regressed this to https://trac.webkit.org/changeset/262124/webkit

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