Repected Artiom,
We tried this following solution to solve our missing lines problem.
Thought we got proper ploting pdf , but please confirm the same that whether this is correct or not.
In Autocad/Autoplant application , under 'Format' menu - > Linetype - > Selected the Hide Lines, then increases the global scale factor to 1 and unchecked the option 'Use paper space units for scaling'.
Screenshot is attached .
Please Confirm the same whether it is correct or not.