printing the pdf version gets laggy and unfinished.

[Thedrogon]

• I have searched open and closed issues and pull requests for duplicates, using these search terms:
  print book
  pdf version

• I have checked the latest main branch to see if this has already been fixed, in this file:
  yes

URL to the section(s) of the book with this problem:

Description of the problem:
The doc option of printing the pdf does not happen, rather gets stuck and also makes my device super laggy.
Suggested fix:
fix the print option.