[Webkit-unassigned] [Bug 176162] New: <strong> text is rendered for incorrect size

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=176162

            Bug ID: 176162
           Summary: <strong> text is rendered for incorrect size
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: All
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Text
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: danyao at chromium.org
                CC: mmaxfield at apple.com

Created attachment 319460

  --> https://bugs.webkit.org/attachment.cgi?id=319460&action=review

Copy of the web page demonstrating the problem

<strong> element is incorrectly rendered in Safari, Safari Technology Review and WKWebView. In the screenshot below, notice that "hundreds of alts" are rendered with a small font size. The font-size is specified in <style> as 1em. The computed font-size on a fresh reload is 9px.

The strange thing is that any change to a style (even if not directly related to font size) in Web Inspector, such as toggling the font-color, will cause the size to be recomputed to 16px.

The problem is noticed on https://hackcabin.com/post/dont-mine-bitcoin-mine-altcoins/. A copy of the html is attached.

Screenshot: https://photos.app.goo.gl/WMHtSGagib58iX9k2

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