when applying the filter in a column where the scroll is on the right, all the scroll is reset to the left and the popup moves to another column. 

When the SelectionMode is set to Extended and we try to select items that are not currently visible using Shift + press only the Rows that are currently visible are selected.

Data can come dynamically from JSON, XML, and SQL.  Without the ability to bind a grid to commonly used structures (like a Newtonsoft JSON, .NET DataTable or Dictionary), this grid has VERY limited use for apps that use modern ways of gathering and managing data (like JSON-Schema).

When the DataGrid is placed inside a Panel (for example Grid) and after that is removed from that panel and is placed in another one the selection stops working. The issue is caused by the inaccurate order of the thrown Unloaded and Loaded events which the control relies on.