General Info for Students dissappears

On https://www.rosariosis.org/demonstration/ using Chrome and Firefox.

Go to Student Fields in the Students tab. Add a custom Field Category, then a Field in the category in the Address Fields. Delete the custom Field Category you created. The category will not be deleted, instead the General Info for all students will be deleted and cannot be restored.

I have managed to recreate the same situation with my own installation.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information