[Webkit-unassigned] [Bug 187990] New: Once <object> is hidden, its content won't be displayed again if its URL has fragment identifier ("#").

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=187990

            Bug ID: 187990
           Summary: Once <object> is hidden, its content won't be
                    displayed again if its URL has fragment identifier
                    ("#").
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: baba at bpsinc.jp
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Created attachment 345746

  --> https://bugs.webkit.org/attachment.cgi?id=345746&action=review

testcase

Steps to reproduce the problem:
1. Download and extract attached testcase.zip
2. Open index.html

What is the expected behavior?
At first there is a red circle. It will be hidden after 0.5 second, and it appears again.

What went wrong?
The red circle, the content of the <object> element, is not displayed again despite the <object> is shown.

This issue won't occur if the URL does not include "#".

Only Safari and Chrome have this issue. Firefox, Edge and IE work well.

chrome bug: https://bugs.chromium.org/p/chromium/issues/detail?id=865932

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