When i try to update the image file from am image object, the image file is not updated

Steps to reproduce

• Create an image object
• Upload an image from your disk (Image1.jpg)
  + publish the image object
• edit the image object again
• replace the image clicking on "Replace this image", uploading another image (image2.jpg)
• Aparrently, the image was replaced, since the image2.jpg appears on the image placeholder
• Now publish the updated image object
• When we see the preview of the image object, we can see that the image in there is the image1.jpg and not the image2.jpg

If we edit th eobject again, the image in there is the first one i.e. the image1.jpg