I have a PDF opened in Preview where on one page a diagram should show, but it doesn't. The same holds for the program "PDF Reader Pro Lite" and probably other PDF readers. But if I open the PDF in Google Chrome or "Adobe Acrobat Reader DC", then the diagram is visible. Does anyone know why it won't work for certain applications?
I am running macOS Mojave 10.14.5, and all applications are up to date.