User blog comment:Kirkburn/Technical Update: July 1, 2015/@comment-5558012-20150702141439/@comment-126761-20150702171029

I'll let the team know - that's what we would call a regression. We do run a lot of QA on each release, but the sheer variety of features and pages on Wikia does mean odd things can slip through the cracks. (That issue doesn't appear on the Desktop XL format, for example.)