Name reference view

I have my IMDb account set to "Show reference view (old title/name page layout)."

Starting today, the site doesn't appear to be consistently following this setting. Some pages do view in the correct reference-view layout, but clicking a link to another page tends to undo this and present the unwanted new-style layout.

I can still manually access pages by appending "/reference" to the URL, so the feature is clearly still active - the site just seems to be ignoring my account preference for this view.