If you see the Previous & next icons on left and right side of PDF Viewer, its mostly being caused by lazyload functionality. What you need to do is Disable Lazyload for viewer pages to get it displaying properly.
If you see the Previous & next icons on left and right side of PDF Viewer, its mostly being caused by lazyload functionality. What you need to do is Disable Lazyload for viewer pages to get it displaying properly.