I’m not sure why this is happening, but on occasion PDFs do not load fully in Wrike (some aspects of the PDF do not appear). When this happens you have to open the PDF in a new tab. This makes it difficult to make comments directly on the PDF since I cannot see the entire PDF unless I open it in a new tab.
This is only happening selectively. Some PDFs I can open and see the whole document while others only open with some of the document showing up. I'm currently using google Chrome.