Images were showing up and printing fine on.pdf just a couple days ago. I am having the same issue, It doesn't work with Print, Export to PDF, or Export to Excel . I would like to say there's a * temporary * workaround for this issue. .. you can migrate your existing Sheets data and images into Google.
Printing as an image allows the text to appear, but the image quality isn't Microsoft Office 2013 - problem is present when printing documents from Word, Excel or Visio. We have used print as image as a temporary fix, but the image .. is not working on Windows 8-32 bit when cache folder is missing.