Border Issue on IOS/OSX default PDF Viewer

Hi, I am using the PDF library in Xamarin Forms .Net Standard. I am setting all borders of a PDF Grid to transparent, but when it is generated and viewed on the default IOS/OSX viewer (built in one) it always shows a border on the first cell written to a page, is this a known issue?

The attachments provided are shown is IOS/OSX viewer and Chrome for comparison.

Thanks,

Chris 

Attachment: Example_Images_30a68e74.zip

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