User blog comment:Rupert Giles/Layout Changes: Breakpoints and Typography/@comment-4476879-20150519175519/@comment-126761-20150519180313

I'm not able to reproduce this issue, so far. Could you send in a note to Special:Contact/bug with a screenshot? We'll certainly want to look into it further.

Edit: actually, I believe I have seen this happen now. I will inform the technical team.