Quartz / PDF viewing problems

Hello all;

I work with a lot of PDFs, from a variety of vendors. Occasionally, I get a PDF that MacOS/IOS chokes on- images get chopped and compressed, and black or white bars appear across the document in seemingly random patterns. I suspect it's an OS issue, as the apps that have problems (Safari, Preview, Devonthink) use the Quartz PDF framework; other apps like Firefox or Microsoft Edge can render the PDFs with no issue.

it's rare, like 1 in hundreds of PDFs, and the easy fix is Adobe Acrobat, but i have no love for that software or it's vendor- PDFs should be an open standard. The only other thread in these forums on the topic is 6 years old and treated the root cause as a corrupted document, but my affected documents open properly- with the right app, at least. Elsewhere, there isn't much to be found, but there arfe others who deal with these PDFs that report the same issue.

I'm trying to work with the vendors these PDFs come from; what I need help with is, what do I tell them to specifically look for? It seems to be something subtle is being coded into the PDF format of certain docs; I am hoping that someone with experience with Quartz or with PDF creation might have a clue as to what. The Vendors so far don't seem to have much PDF understanding in house, beyond how they create them, If I can properly clarify the underlying issue, maybe it's something i can bring up with Apple to get addressed properly once and for all.

We can dream, je? Thank you for any help you may have.