Printing to PDF corrupts Isometric view

[Lambie_Bruce]

I use AutoCAD 2020 for Mac to make construction drawings for a university theatre department. My tendancy has been to draft up the model, and create an orthographic projection in 3 viewports for my carpenters, with another viewport giving an isometric projection of the finished product. 

The issue is that, when I export the drawings to PDF, or when I print to PDF, my isometric projections come out like this:

which is strange, because in AutoCAD, they are projecting properly:

(this particular drawing is in perspective, not isometric, but the problem is persistent either way)

My product version is Q.46.M.222 (AutoCAD 2020.3.2), and my Mac is a late 2011 model MacBook Pro with 8GB RAM and an SSD. 

Any thoughts? I also welcome criticism of my dimensioning, but I would love answers about this problem. 

Thanks!

[maxim_k]

Ho @Lambie_Bruce ,

What macOS do you have on your Mac?

[Lambie_Bruce]

Hi @maxim_k , my Mac is running 10.13 High Sierra - that's the most recent OS this MBP can run.

[maxim_k]

Hi @Lambie_Bruce ,

Do you have this issue I all of your drawings of such type?

Can you share one of them here on the Forum?