https://bugzilla.mozilla.org/show_bug.cgi?id=1637098
1637098 - Intermittent bidi/1161752-5-embed.html == bidi/1161752-5-embed-ref.html | image...
RESOLVED (nobody) in Core - Layout: Text and Fonts. Last updated 2020-06-09.
intermittentbidiembedhtmlref