PDF files do not always render text, but do show graphics. Seems to be related to the PDF being encrypted. An example (copied to local file system):
Complete PDF. Text is rendered in other PDF viewers.
No text.
The same issue with v0.6.5 on Mac (no custom CSS). Example pdf: geometry-of-linear-equations.pdf
Once, we update to a newer version of electron, we should get another PDF viewer. Hopefully, it will solve this issue.
Same Issue, in my case, the PDF file loaded after extremely long period of time. The version that I am currently running is 0.7.6, both on Mac and windows
Same issue here. I am running 0.8.9 on Windows 10.
Confirmed still seeing the same issue on a Mac using version 0.9.6.