I have seen others post about this but haven't seen a correct solution. Basically when I export, any masked image gets distorted; either blown up within the mask, or shrunk down and tiled within the mask. I have tried the various ways to export the artboards. My MacOS and XD are both up to date.
A couple Adobe people have mentioned it is an issue with Preview. However, it's not just Preview, it's also Safari, and the iPhone default viewer.... I'm struggling because I need to share my artboards as a PDF, and I can't tell my colleagues that they MUST open it in Acrobat/Chrome/etc. for it to view properly... Anyone found a solution that isn't a workaround?