Wed Apr 17 13:17:15 BST 2019
As the generated name is the same for both picture, a dialog opens to rename the 2nd picture, but it shows only the first one. There is a clickable message saying that the picture is not on the local machine and offering to transfer it, but it does not work.
We can't really take an action without seeing both files.
(it seems also that the date&time used in the renaming where the one for the file, not the exif one, but that's another bug).
More information about the Digikam-devel