I believe this is not a regression because I haven’t touched the accordion functionality in Bug 1344091, but now with the References section that can be collapsed by default, people may encounter the issue more often.
Bug 1575805 Comment 3 Edit History
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I believe this is not a regression because I haven’t touched the accordion functionality in Bug 1344091, but now with the References section that can be hidden by default, people may encounter the issue more often.