Work.com: Recognition - Behavior of the Image URL Field on the Badge Object
|Knowledge Article Number||000206026|
|Description||I attached an image, but on the Badge edit screen I see "No file attached" for the URL.
|Resolution||The Image Url field is only used to upload new images. On the edit screen, even though you see No file attached for the Image Url field, the image detail is still there and can be seen again when you click on save. So you do not need to select a new image every time you edit badge details.
You might want to create a help text for this field to let users know about the behavior.