:dvarga can you try filing a bug on prototype and see if the behavior is the same? Perhaps this is something specific to bugzilla staging. I tried it and I think I got the same behavior, but I'm not overly familiar with that tool so it'd be good to have someone else test it. https://treeherder-prototype.herokuapp.com/
Bug 1619627 Comment 3 Edit History
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Armen or :dvarga can you try filing a bug on prototype and see if the behavior is the same? Perhaps this is something specific to bugzilla staging. I tried it and I think I got the same behavior, but I'm not overly familiar with that tool so it'd be good to have someone else test it. https://treeherder-prototype.herokuapp.com/