PDF Viewer bug report
Save this article to zotero and use internal PDF viewer to view it, and you will find that on the 35-th page, the picture on the top is not rendered correctly, with a strange black shape covering the body of the picture. (I do not know how to post a picture in the discussion, so I can only give link of the article.) https://www.sciencedirect.com/science/article/pii/S0010027716300026
maybe it can help you