I am working with pdfbox to transform input pdf files to images, which are later fed to an OCR library. It works perfectly in most of the cases but I stumbled upon this particular case in which all text disappeared from the rendered image.
My source code for the method which converts the pdf into images:
I attached to this issue the pdf file for which I identified the problem and the resulting images.
I hope this is helpful for anyone else encountering the same problem!