Why do fields turn black when using Preview to duplicate or print some pdfs? I've come across a PDF form, whose editable fields turn black when, after completing the form, I try to:


duplicate
move
print, or
email 


the form.

Here's what the form looks like when I download it.


And here's what it looks like when I try to take any of those actions listed above.


Note: I didn't create the PDF, and I don't have (or want) Adobe Acrobat professional on my machine.

Has anyone else seen this before?
(I have a workaround, which I'll share below.)
This is workaround, but it does the trick.

Use the print function to "print" a new version of the completed pdf 


This seems to restore the grey beneath the filled-in text, like so...