QTI 2.1: hotspot / drawing can share same uploaded image

The hotspot and drawing can share the same uploaded file which can lead to the following problem:

• User uploaded a background for a hotspot
• Than it uploads the same image (same file name) for a drawing
• Go back to the hotspot and resize the image using "Optimize size for mobile"

As the drawing share the image but only know the not resized size of the image, the image can appears several time as a pattern.