I'm sure there are others that might have posted about this, but I thought I'd share this here. The visual bug presented on the image linked are on both sides of the coat. I hope that this gets fixed in the near future because I really do love this look, the issue it has though just ruins it for me personally.
It should also be noted that I have seen a few other warlock robes with similar issues as well, but at a lesser extent. I did not want to post them here, as that would subvert from the main issue I wanted to present, but if anyone at bungie is reading this it might be worth looking into.