PDF display issues are often on the PC side. I’ve had similar difficulties myself. Actually, online editors can be used for working with PDF files. For example, I mostly convert https://pdfguru.com/avif-to-jpg AVIF to JPG with it. But it’s also great for editing or viewing, like in your case. It works well on mobile devices too, and by the way, thanks to that, you can check if the issue is with your PC or not.