Number format not working when the decimal separator is set to comma.

When the collection bound to the ItemsSource property calls the Move method, the OnItemsChanged method of RadBreadcrumb receives the NotifyCollectionChangedAction.Move as an action, which is not handled.

An ObjectDisposedException exception is raised when a RadSvgImage is placed in a DataTemplate. It is present when the XmlSource property is utilized.

As a workaround, you can place the SVG string into a new .svg file and utilize the UriSource property of RadSvgImage.

Currently filtering with virtualized RadComboBox is not supported as the filtering feature works with the containers (changes their Visibility).

The image is not rendered when the horizontal alignment is set to center.

When in the RadGridView details template on a touch device subsequent clicks are not registered.

When displaying PDF-Files using PDFViewer, ContentElementsCanvas .RenderAsync uses reflection (DispatcherObjectUtils.ApplyDispatcher) to render Visuals on multiple threads.
However this leads to a memory leak since the dispatchers cant be GC'ed, see screenshot below.




The Screenshot is from the actual application we expirienced this issue with, the attached reproduction example is a boiled down version of what your code does.
If you wanna reproduce this on your own, create an application that uses PdfViewer that switches between many pdf files. The ammount of Dispatchers will grow steadily, probably to a total of the number of threads used by Task.Factory.

Create NuGet symbol packages - containing the .pdb files - corresponding to the primary NuGet packages. The process is described here: https://docs.microsoft.com/en-us/nuget/create-packages/symbol-packages .

This will facilitate the debugging of problems in the controls code.

Images hosted inside multiple Form XObjects are not rendered.

 Form XObject that contains path with a Matrix position is not rendered.

Some documents cannot be printed with the PdfViewer. In this case no exception is thrown and the result file is 0 bytes. 

RadMap control has an interesting feature in which, while zooming in, if no data is available for a zoom level, the last available image of a lower zoom level is used (scaled up to match the geographical bounds of the image). It would be really useful if the feature was available also while zooming out, allowing users to not have to have data for all zoom levels when using a custom offline provider.

Vertical and horizontal scroll bar moves too fast once outside of the Viewport and one is dragging the selection.

Add an event on the RadVirtualKeyboard class that is raised when a key button is pressed. For example, KeyPressed or something like this. 

Exception when changing ItemsSource when it's a CollectionViewSource and grouping is applied.

Empty cells appear when the RadGridView contains many cells in the viewport and the view gets resized.

To work this around you can extract and modify the ControlTemplate of GridViewCell, in order to set the MinHeight property of the "PART_ContentPresenter" element to a number close to the RowHeight of the RadGridView control.

The CellUnloaded event of RadGridView is not invoked consistent compared to CellLoaded. For example, when you scroll up and down, the CellLoaded event is invoked for each new cell that appears in the view port. However, CellUnloaded is not invoked for cells going outside of the viewport.

Provide option to set if the grouping is case-sensitive

When opening a document with a CFF Type1 font an exception is thrown: NullReferenceException: 'Object reference not set to an instance of an object.'

Enable the customers to create and modify .pptx (PowerPoint) files . They need processing as well as showing such documents.