PDF rendering problem in Wordpress interface

[skadhu]

I'm posting PDFs created in Publisher (Mac desktop, OS 10.14) to a website for download and have run across a problem I don't know how to fix/avoid. The PDFs themselves are fine when opened, but the Wordpress interface puts a black background behind everything on the page. This shows in the thumbnails and also in the WP interface for the file itself (and results in black text disappearing altogether if it's not on a differently coloured background).

I've never had this happen with PDFs before, but it's a problem with any I create in Publisher. I know it's not serious in that the PDF itself downloads just fine, but it's just... really bugging me. Does anyone know why this happens or if/how I can avoid this problem?

[v_kyr]

• PDF thumbnails have a default black background - Wordpress

• Black backgrounds in PDF thumbnails - Wordpress

• etc.

[skadhu]

thanks!