Doing a few more tests around this, this infinite loading only seems to happen when DevTools. I started a few retriggers on my try pushes, I wonder if this is simply related to what :ochameau describes in https://bugzilla.mozilla.org/show_bug.cgi?id=1503499#c14 . Maybe I just got a green try on https://treeherder.mozilla.org/jobs?repo=try&revision=aba4358c9d7c3b8b399c0b73ce6d9b79c7281464 by chance. Will update when I get results here.
Bug 1678565 Comment 4 Edit History
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Doing a few more tests around this, this infinite loading only seems to happen when DevTools are open. I started a few retriggers on my try pushes, I wonder if this is simply related to what :ochameau describes in https://bugzilla.mozilla.org/show_bug.cgi?id=1503499#c14 . Maybe I just got a green try on https://treeherder.mozilla.org/jobs?repo=try&revision=aba4358c9d7c3b8b399c0b73ce6d9b79c7281464 by chance. Will update when I get results here.