Am I the only one to whom this happens or is this a new issue?

After project setup, we check that all files are parsed properly by opening them in Studio. If they aren't parsed properly, we delete them from the project, adjust the settings and add them again. Unfortunately, it does happen that a file is still open in the Editor when it is removed from the project. Studio does not complain.

When you try open the newly added file version, your "ghost" file will cause an error that FileID xxxx cannot be found. The missing file name remains in your editor list and will show up each time you open this particular project. The only way to exorcise that ghost is be hacking the .sdlproj and the UserSettings.xml files.

I am aware that all files *should* be closed in the editor, but accidents happen and a simple warning by Studio about open files would go a long way.