Huge apologies to anyone stuck on floor 61 on a NG+. I could've sworn I'd put the reset code in for that floor and tested it, but as far as I can tell, that was all completely in my head. Anyone stuck there should be unstuck now.
Source: Steam Community (opens in a new tab)
Build and release context
Steam update times within 24 hours of this post. Matching dates do not confirm which build it describes.
Build 1590914 · public branch
Steam updated · First observed