When I export files to Helicon for focus stacking, on importing the stacked image back into Lightroom (Classic CC 8.0) I have been getting a strong pink overlay on the finished file as soon as I try to zoom in. I found that if I turn "remove chromatic aberration" off the pink overlay disappears. Images are taken with a Zeiss Milvus 21mm lens. If I apply a profile from any other lens, the remove chromatic aberration effect doesn't happen. So this appears to be a bug that only affects Zeiss lenses.