PDFKit scrolling bug? Can't scroll

Hi, if I create a very simple app that just loads a 2 page PDF with PDFKit, where the size of the view is the entire screen, I'm not able to scroll the PDF up and down. This is an issue because I have a title bar and navigation buttons at the bottom and I need to scroll the PDF up so I can see the bottom of the PDF page.

Details:
PDF scrolling bug. I created PDFView on whole screen and set pdfview’s content inset as (100,0,100,0). So when app is launched, PDFView should be scrollable to show top and bottom area of PDF because I set content inset. But it isn’t scrollable at this scale. If you zoom in a little, then PDFView become scrollable.
Here's the exact code I added to the ViewController on a new project.

Is this a bug in PDFKit or is there a way to add padding on the top and bottom?



Code Block         let pdfdoc = PDFDocument(url: Bundle.main.url(forResource: "1", withExtension: "pdf")!)
        pdfview.pageBreakMargins = .zero
        pdfview.pageShadowsEnabled = false
        pdfview.document = pdfdoc
        pdfview.autoScales = false
        pdfview.scaleFactor = (UIScreen.main.bounds.height - 100) / (792 * 2)
        (pdfview.subviews[0] as? UIScrollView)?.contentInsetAdjustmentBehavior = .never
        (pdfview.subviews[0] as? UIScrollView)?.contentInset.top = 100
        (pdfview.subviews[0] as? UIScrollView)?.contentInset.bottom = 100
        (pdfview.subviews[0] as? UIScrollView)?.verticalScrollIndicatorInsets.top = 100
        (pdfview.subviews[0] as? UIScrollView)?.verticalScrollIndicatorInsets.bottom = 100
    }


PDFKit scrolling bug? Can't scroll
 
 
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