Syncfusion DatePicker in dialog crashed app

[WenHong-Lau]

I am testing Syncfusion's DatePicker component with MauiEmbedding. I've copied thecode from Syncfusion's documentation, clicked the button to trigger the open of the dialog crashed the app.
Exception thrown: 'System.ArgumentOutOfRangeException' in System.Private.CoreLib.dll is thrown.
<Grid> <picker:SfDatePicker x:Name="datepicker" Mode="Dialog"/> <Button Text="Open Picker" x:Name="pickerButton" Clicked="Button_Clicked" HorizontalOptions="Center" VerticalOptions="Center" HeightRequest="50" WidthRequest="150"> </Button> </Grid>

Other tests
Default mode (not dialog), app does not crash
Tested dialog mode without Uno, app does not crash

[WenHong-Lau]

Regarding the DataGridComboBoxColumn:
Upon opening and closing the combobox in the grid without selecting any values, the application crashes, accompanied by the following exception:

System.ArgumentNullException: Value cannot be null. (Parameter 'nullableType')
   at Syncfusion.Maui.Data.NullableHelperInternal.IsNullableType(Type nullableType)
   at Syncfusion.Maui.DataGrid.DataGridEditingController.CommitCellValue(Boolean isNewValue)
   at Syncfusion.Maui.DataGrid.DataGridCellRenderer`2.CommitCellValue(Boolean isNewValue)
   at Syncfusion.Maui.DataGrid.DataGridEditingController.EndEdit(Boolean canCommit, Boolean cancelEdit)
   at Syncfusion.Maui.DataGrid.DataGridCurrentCellManager.HandlePointerOperation(RowColumnIndex interactedRowColumnIndex)
   at Syncfusion.Maui.DataGrid.DataGridRowSelectionController.HandlePointerOperation(RowColumnIndex rowColumnIndex)
   at Syncfusion.Maui.DataGrid.DataGridCell.OnCellTapped(TapEventArgs e)
   at Syncfusion.Maui.DataGrid.DataGridCell.OnTap(TapEventArgs e)
   at Syncfusion.Maui.Core.Internals.GestureDetector.PlatformView_Tapped(Object sender, TappedRoutedEventArgs e)
   at WinRT._EventSource_global__Microsoft_UI_Xaml_Input_TappedEventHandler.EventState.<GetEventInvoke>b__1_0(Object sender, TappedRoutedEventArgs e)
   at ABI.Microsoft.UI.Xaml.Input.TappedEventHandler.Do_Abi_Invoke(IntPtr thisPtr, IntPtr sender, IntPtr e)

Regarding DataGridDateColumn columns:
When opening and closing the picker twice, the entire application freezes, rendering it unresponsive.

Regarding the DatePicker control:
I attempted to implement the DatePicker in Dialog mode, but open the dialog from the code behind resulted in a crash. The exception message is as follows:

System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')
   at Microsoft.Maui.Controls.Layout.get_Item(Int32 index)
   at Syncfusion.Maui.Popup.PopupHeader.UpdateHeaderChildView()
   at Syncfusion.Maui.Popup.PopupHeader.UpdateHeaderAppearance()
   at Syncfusion.Maui.Popup.SfPopup.UpdatePopupStyles()
   at Syncfusion.Maui.Popup.SfPopup.UpdatePopupView()
   at Syncfusion.Maui.Popup.SfPopup.DisplayPopup()
   at Syncfusion.Maui.Popup.SfPopup.OnIsOpenPropertyChanged(BindableObject bindable, Object oldValue, Object newValue)
   at Microsoft.Maui.Controls.BindableObject.SetValueActual(BindableProperty property, BindablePropertyContext context, Object value, Boolean currentlyApplying, SetValueFlags attributes, SetterSpecificity specificity, Boolean silent)
   at Microsoft.Maui.Controls.BindableObject.SetValueCore(BindableProperty property, Object value, SetValueFlags attributes, SetValuePrivateFlags privateAttributes, SetterSpecificity specificity)
   at Microsoft.Maui.Controls.BindableObject.SetValue(BindableProperty property, Object value)
   at Syncfusion.Maui.Popup.SfPopup.set_IsOpen(Boolean value)
   at Syncfusion.Maui.Picker.PickerBase.ShowPopup()
   at Syncfusion.Maui.Picker.PickerBase.OnIsOpenChanged(BindableObject bindable, Object oldValue, Object newValue)
   at Microsoft.Maui.Controls.BindableObject.SetValueActual(BindableProperty property, BindablePropertyContext context, Object value, Boolean currentlyApplying, SetValueFlags attributes, SetterSpecificity specificity, Boolean silent)
   at Microsoft.Maui.Controls.BindableObject.SetValueCore(BindableProperty property, Object value, SetValueFlags attributes, SetValuePrivateFlags privateAttributes, SetterSpecificity specificity)
   at Microsoft.Maui.Controls.BindableObject.SetValue(BindableProperty property, Object value)
   at Syncfusion.Maui.Picker.PickerBase.set_IsOpen(Boolean value)
   at DataAcquisitionTool.MauiControls.EmbeddedDatePicker.Entry_Focused(Object sender, FocusEventArgs e) in C:\Users\wenhong.lau\Documents\DataAcquisitionTool\DataAcquisitionTool.MauiControls\EmbeddedDatePicker.xaml.cs:line 26
   at Microsoft.Maui.Controls.VisualElement.OnFocused()
   at Microsoft.Maui.Controls.VisualElement.OnIsFocusedPropertyChanged(BindableObject bindable, Object oldvalue, Object newvalue)
   at Microsoft.Maui.Controls.BindableObject.SetValueActual(BindableProperty property, BindablePropertyContext context, Object value, Boolean currentlyApplying, SetValueFlags attributes, SetterSpecificity specificity, Boolean silent)
   at Microsoft.Maui.Controls.BindableObject.SetValueCore(BindableProperty property, Object value, SetValueFlags attributes, SetValuePrivateFlags privateAttributes, SetterSpecificity specificity)
   at Microsoft.Maui.Controls.BindableObject.SetValue(BindablePropertyKey propertyKey, Object value, SetterSpecificity specificity)
   at Microsoft.Maui.Controls.VisualElement.Microsoft.Maui.IView.set_IsFocused(Boolean value)
   at Microsoft.Maui.Handlers.ViewHandler.UpdateIsFocused(Boolean isFocused)
   at Microsoft.Maui.Handlers.ViewHandler.OnPlatformViewGotFocus(Object sender, RoutedEventArgs args)
   at ABI.Microsoft.UI.Xaml.RoutedEventHandler.Do_Abi_Invoke(IntPtr thisPtr, IntPtr sender, IntPtr e)

[agneszitte]

cc @jeromelaban, @dansiegel

[jeromelaban]

This would be an issue to report to syncfusion, we do not have control over the code running in that context.