Pictures uploaded as assets with a temporary thumbnail

Uploading a picture is possible from Images as well as from Assets. From Images, a thumbnail as well as the original picture are visible on the form of the document. From Assets however, while a thumbnail only is visible at creation, it disappears and is replaced by the original later on.

STEPS:
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• do Add a File from Assets > hippos (quickstart)
• select a .png, a .jpg or a .jpeg file
• verify that a document is created with the name of the file, for example mypicture.png
• verify that a thumbnail of the original file is visible on the document (screenshot-1)
• edit the document, and use the browse button to select the same file again, upload it
• verify that the thumbnail has disappeared
• verify that the full size picture is now visible (screenshot-2)