If you use FooterContentTemplate to add elements into the footer that require mouse over/click events (eg a Button or a Label with a tooltip), it works fine as long as the datagrid has enough data to scroll. However, if you resize the grid bigger or remove items until you no longer need to scroll and you have empty space between the last row and the footer, then none of those mouse events work.

when setting a custom font to the column header style, the DataGrid crashes with null ref exception on WinUI.

When the value of a property used in a PropertyAggregateDescriptor changes, and the aggregate is displayed in the group header with GroupAggregatesAlignment="NextToHeader", the header does not reflect the updated aggregate result. This issue also occurs when RenderMode is set to SkiaSharp.

When working in Windows with multiple monitors that have different display scales - dragging a window that contains a DataGrid with frozen columns would often lead to the frozen columns not getting rendered correctly. The frozen columns seem to not take into account the Dpi of the new monitor, but of the old one.