When loading a pdf from a file, uri, etc, except as an embedded resource and Switching the app to background and then to foreground again forces an app restart. This is due to the fact that the stream closes. 

When using the back button of the NavigationButtonToolbarItem it does not work, so I cannot navigate back.

The behavior also happens in the PdfViewerSearchNavigationToolbarItem 

I tried to implement the toolbar for the PDF viewer, I'm getting stray hyphens added into the toolbar UI on left and right when overflow mode is set to Scroll.

The behavior also occurs in ImageEditorToolbar and RichTextEditorToolbar.

When loading some PDF documents in app that has German/Italian culture, part of the text got missing or there are issues with document visualization.

When changing the device culture to be RTL, some PDF documents are not displayed correctly in the PDF Viewer.

Text in specific pdf files is not visible in the viewer.
The text is not visualized due to the negative value for font size. 

In a specific document generated from docx the displayed search results are wrong. 

There is a similar question in FAQ for FontForge (https://fontforge.github.io/faq.html#mingliu) where it is described that kaiu.ttf (and probably mingliu.ttf) font does not store the correct outlines and its outlines need special treatment in order to be rendered correctly. The Chinese glyphs are rendered wrong in RadPdfViewer as well. However, Adobe Reader, FoxitReader and ChromeViewer render the glyphs correctly.

when there are input fields with values in them, the values are not displayed in the viewer. 

Slow performance when opening document with many path geometries and image elements

New PdfViewer is great, but has this undesired side effect:

ToggleLayoutModeCommand also sets Page Width to Maximum, at least in Windows.

If by design, there needs to be a workaround when not desired. Otherwise please retain current zoom level during the toggle.

Thank you.

David Pressman