I embedded the DataGridControl control in the TabItem of TabControl and applied PropertyGroupDescription. When switching from TabControl to DataGridControl, it often gets stuck. The specific manifestation is as follows: The DataGridControl control can be loaded as a whole, but the data of the internal cells cannot be loaded. It takes about 10 seconds or several minutes to load. And in the output window of VisualStudio can see System. ArgumentException: "HWND must not be IntPtr. Zero (0) or null." abnormal information, but this could not be captured. If I cancel PropertyGroupDescription, this exception information will disappear and the above-mentioned slow loading situation will become an occasional occurrence. Could you provide me with any directions for investigation?