Black line appears on pasted copy.
Hallo.
I have created in Photoshop a background which I then imported into Animate CC as a background for a character walk cycle. When I duplicate the background layer and join the duplicate background layer to the original background layer, a vertical black line appears between the joined layers, even though there is no line/stroke on the original drawing in Photoshop, and there does not appear to be one on the original image imported into animate. Can anyone tell me why a black line appears between the connected layers.? Thanks for any tips, I have enclosed a screenshot showing the vertical black line between the two images.

