Using 11.1.2, in Project Files view, on a Maven project.
I click right on the icon for src/site, ask for new/directory, and enter 'apt'.
I typo, and accidently type apr.
I click right, select refactor/rename, rename to apt.
Success, but the tree collapses, and when I open it again, no apt directory.
I restarted the IDE, and *still* no apt directory.
It's there in the file system, what gives?