Why don't Unraid radiobuttons show up when printing to PDF (Chrome, Edge, ...)

[hawihoney]

I often print settings of applications or web to PDF.

 

What puzzles me is, that printing Unraid settings pages, that do contain these orange radiobuttons, don't show the radiobuttons. Is this Unraid specific or is this Browser/PDF related?

 

Example Unraid setting: CPU pinning

 

 

And this is the result if I print this page to PDF:

 

 

[Squid]

Because it's the "background" of the button.

 

Do this when printing