Black image when rendering PDF to image with UIGraphicsImageRendererFormat

Hi everyone,

We have been noticing since release iOS 17, that our code which renders PDFPage objects to images was randomly failing (while no error is logged) and produced full black images. This problem seems to mainly occurs on old devices (iPad Pro 2017 and 2018).

I mention that this portion code has been running for several years in our app without any issue from iOS10 to iOS16.

    let renderFormat = UIGraphicsImageRendererFormat.default()
    renderFormat.opaque = true
    renderFormat.scale = CGFloat(scale)
    let renderer = UIGraphicsImageRenderer(size: pageRect.size, format: renderFormat)
    mainImage = renderer.image { context in
        // Setup drawing context
        context.cgContext.setShouldAntialias(false)
        context.cgContext.setShouldSmoothFonts(false)
        context.cgContext.setAllowsFontSmoothing(false)
        context.cgContext.setShouldSubpixelPositionFonts(true)
        context.cgContext.setShouldSubpixelQuantizeFonts(true)
        
        // Draw pdf page 
        context.saveGState()
        UIColor.white.setFill()
        context.clip(to: rect)
        context.fill(rect)
        page.draw(with: .cropBox, to: context)
        context.restoreGState()
   }

Did anyone encountered a similar issue?

Is there any mean to get an error at least in such cases ?

Thanks for any help or advice on this issue.