One example that demonstrates this is the testcase [bug 1816554](https://bugzilla.mozilla.org/show_bug.cgi?id=1816554) ([attachment 9317487 [details]](https://bug1816554.bmoattachments.org/attachment.cgi?id=9317487)).
Bug 1819335 Comment 1 Edit History
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Found this while debugging some Google Docs issues. One example that demonstrates this is the testcase [bug 1816554](https://bugzilla.mozilla.org/show_bug.cgi?id=1816554) ([attachment 9317487 [details]](https://bug1816554.bmoattachments.org/attachment.cgi?id=9317487)).