I'm going out of my mind. I've erased part of a patterned shape, and when I export to PDF and look at the PDF in anything other than AI, some of the erased pattern appears again. I've tried flattening the image, I've removed a ton of layers, I've looked at the outline (ctrl-y) view and nothing fixes this problem, nor shows why it is happening.
I've included screenshots of what I'm seeing in both AI and Chrome, when opening the same exact file. Help!