[Webkit-unassigned] [Bug 179665] New: Transition is blocking the display of borders

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=179665

            Bug ID: 179665
           Summary: Transition is blocking the display of borders
           Product: WebKit
           Version: WebKit Local Build
          Hardware: PC
                OS: Windows 10
            Status: NEW
          Severity: Major
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: iqwmailro at gmail.com

Steps to reproduce the problem:
I use a framework (PrimeFaces) that has something like:
.ui-layout-unit {
  visibility: hidden;
}
and 
table tr td {
  border: solid 1px #000040;
  transition: all 0.2s ease;
}
in their CSS.

You can see a demo here: https://codepen.io/anon/pen/POjvKZ

To reproduce, please go use the Developer Tools and trigger / remove "visibility: hidden;". Or use JavaScript to remove that CSS declaration.

Sometimes it works fine, sometimes it doesn't.

What is the expected behavior?
Display the borders.

What went wrong?
The borders aren't showing because of transition, visiblity: hidden and border-collapse: collapse.

It works just fine in v59 or lower versions of Chrome.

Did this work before? Yes v59

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