I have had a persistent but to me random and inexplicable break in several of my JMP projects. The issue is that particular open tabs in the project will be duplicated. One tab will be contain the data, the other will be a blank tab. I have found no other way to clear the blank tab than to close all of the tabs, save the new project then reopen the project and files.
I do not create project tabs and store them as content in the project. All tabs are bookmarked and opened as needed. It is a peculiar issue. There seems to be no corruption in the data files or any other functioning, its just an annoying trait where empty tabs appear for no reason.