Why does Dispatcher come up every time I open Chrome on my cell phone?

[AC Question]

I recently looked at a website, opened a PDF with specials/rebates listed, and printed it to my network printer from my LG G4 Android phone. Now, every time I open Chrome, Dispatcher pops up with that PDF and I have to close it (back arrow at top left of Dispatcher page) to use Chrome. Same behavior whether I try to open Chrome directly, or I get there from a link (from an email, for example).

I tried clearing my browsing history to no avail.