Hi @charlie –
Noticed this afternoon that a site that has been running 6.2.1 since release on Monday stopped displaying pages within the documents list in Cornerstone. I panicked at first when only one of my 24 pages showed up. A few minutes later a second one showed up but the rest are still missing.
Note 1: This wasn’t happening last night when I was working on the site. So it didn’t happen at the point of update.
Note 2: Oddly enough, if I specifically select “pages” from the document selector rather than “all” they show. Screenshots below.

Welp, figured it out. Turns out it was due to the plugin Post Types Order by NSP Code. Know this isn’t necessarily a CS issue at all. But any thoughts what might be causing it? I don’t even have it enabled on pages.