Buttons for reordering of images sometimes have no effect

Selecting multiple attachments as images when editing a device. Now, when trying to reorder images, the buttons for moving images for- or backwards do not change the position of an image under certain circumstances.

Recreate:

• create a device
• create 2 attachments
• edit device:
  • add both attachments as images
  • move the currently visible image (in preview) to the other spot. This should work and it should now still be visible
  • move the currently not visible image to the other spot. This failed for me.