Frame doesn't go to document viewer's bookmark

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C#

XPS

DocumentViewer

I have this code where I'm creating an XPS document and set it to the document viewer, also the document viewer is in a frame which allows me to navigate inside the viewer to a specific bookmark(according to this link).

var fixedDocument = ...XPS document logic here...;

// Set up fresh XpsDocument
var stream = new MemoryStream();
var uri = new Uri("pack://document.xps", UriKind.Absolute);
var package = Package.Open(stream, FileMode.Create, FileAccess.ReadWrite);
PackageStore.AddPackage(uri, package);
var xpsDoc = new XpsDocument(package, CompressionOption.NotCompressed, uri.AbsoluteUri);

// Write FixedDocument to the XpsDocument
var docWriter = XpsDocument.CreateXpsDocumentWriter(xpsDoc);
docWriter.Write(fixedDocument);

FixedDocumentSequence document = xpsDoc.GetFixedDocumentSequence();

viewer.DocFrame.Source = ((System.Windows.Markup.IUriContext)document).BaseUri;
// Display XpsDocument in DocumentViewer
viewer.Preview.Viewer.Document = xpsDoc.GetFixedDocumentSequence();
DocFrame.Source is correct "pack://pack:,,document.xps,/FixedDocumentSequence.fdseq"

The problem is when I try to navigate to a specific bookmark in the document like

var uri = new Uri("pack://pack:,,document.xps,/FixedDocumentSequence.fdseq#asd");
DocFrame.Navigate(uri);

I get the error "Application identity is not set." A new document viewer is generated but the visualization point is on the top most page (default) meaning that it is not moving at all.

What I have tried:

var fixedDocument = ...XPS document logic here...;

// Set up fresh XpsDocument
var stream = new MemoryStream();
var uri = new Uri("pack://document.xps", UriKind.Absolute);
var package = Package.Open(stream, FileMode.Create, FileAccess.ReadWrite);
PackageStore.AddPackage(uri, package);
var xpsDoc = new XpsDocument(package, CompressionOption.NotCompressed, uri.AbsoluteUri);

// Write FixedDocument to the XpsDocument
var docWriter = XpsDocument.CreateXpsDocumentWriter(xpsDoc);
docWriter.Write(fixedDocument);

FixedDocumentSequence document = xpsDoc.GetFixedDocumentSequence();

viewer.DocFrame.Source = ((System.Windows.Markup.IUriContext)document).BaseUri;
// Display XpsDocument in DocumentViewer
viewer.Preview.Viewer.Document = xpsDoc.GetFixedDocumentSequence();
DocFrame.Source is correct "pack://pack:,,document.xps,/FixedDocumentSequence.fdseq"