Resource Files (Sections) not being deleted

When a teacher loads an image/video/file into the section of a course, and then later deletes that image/video/file, the image remains on the backside (within the system files).

The image does not leave the system files at any point and remains. The image/video/file is backed up when the course is backed up therefore creating a larger backup when the resource is actually not in the course.

Can you provide some insight on how to solve this issue, as it appears that even if a file is deleted, it never is really deleted, and this causes some problems with growth and file management in the future.

Replication steps:

1. Login to Course as Teacher
2. Click Edit Section
3. Insert Image into Section
4. Save Section and Image
5. Delete Image from Section
6. File remains in the system files