I just had this issue in AI and it was because one of my artboards had mixed color profiles. I had copied something in from InDesign and it had some spot colors. Even though I rasterized that whole artboard in AI, when I exported to PDF it didn't want to show anything but the spot colors (I'm guessing because I had "preserve spot colors" enabled when I exported). I converted the spot colors to RGB and everything showed correctly after I exported to PDF again. Not sure if it was just my specific issue, but figured I'd add my issue here just in case it helps someone else.
... View more
AdChoices