The Upload tab in the inline uploader can disappear after deleting or editing a file.
Steps to reproduce:
- Go to Write -> Write Post and scroll down to the inline uploader.
- Ensure you have at least two uploads under the Browse All tab (and at least one which you don't mind editing or deleting).
- Click Browse All, click on an upload, click Edit, and either delete the file or make changes and save it.
- When the uploader returns to the Browse All tab, the Upload tab has disappeared.
It's not possible to return to the Upload tab without reloading the post writing screen.
Note that this doesn't happen if you upload a file then immediately click Edit and delete or make changes to the file.
Not sure where the problem lies as I'm not too familiar with the uploading system.