Adobe reader mobile adds # symbols to a PDF file

Adobe Reader Mobile on my Android shows extra # symbols in a PDF file, even though the desktop Adobe Reader shows it correctly, and I can view the file correctly with the built-in reader.

Adobe Reader Mobile:

Another reader:

This is a link to the file in question: 

https://drive.google.com/open?id=1gTrxJiVSwnA7TR59QN44l7lNAqqep3B2