The images we are importing are coming through missing their blue channel data. Images are in .png format and have been tested with different image editor programs and different systems and versions of UE4.
As can be seen in the picture the preview of the image is purple (the correct colour).
Turning the green and red channels down and the blue to max results in a black image, illustrating that there is no blue data.
Attached is one of the exact image we are using, but even some different shades of purple and blue have the same result.
These issues are only happening in images with a majority of transparency. We have some images with transparent corners or decals of the same purple and blue shades that are not causing issues.