OP - https://community.xibo.org.uk/t/cms-backend-campaign-not-showing-created-folder/29581

Folders do not have owners, when non super admin user creates a Folder under Root Folder, then that user will not have permissions to it - meaning rename will not work and on page reload that folder will be hidden from the user.

When the same user creates a folder under a folder to which they have view/modify permissions, then it works correctly.