Resolving as a duplicate of bug 1559393 (though this was filed earlier) because the later bug has a bit more debugging info attached.
Bug 1559368 Comment 3 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
Thank you for your report. Resolving as a duplicate of bug 1559393 (though this was filed earlier) because the later bug has a bit more debugging info attached.