Didn't see that before, "selection only." Is that a new feature?

You know, I'd love an option where it could be a menu entry could be both a submenu or a button. Something like, if you hover over import, you get the current behavior, but if you click it, you get a more relaxed import option that will accept any file, check the file extension, and ask if it has a plugin installed for that file extension. Same for export, either a menu for the current behavior or a Save As dialog that offers the same Save As Type select as office programs (or intelligently selects which plugin to use based on the extension of the name you enter, objecting if you use an extension that you don't have a plugin for.)

Sorry it was a little messy and took a few edits. I screwed up the repro files, I got it straightened out.

If that's the case, I still have the same issue. Whether its hidden from viewport or from renderer, it's still going into the export.

This might help get it across