ComboBox: [WinUI] Interacting with the ComboBox inside RadCollectionView using a mouse pointer on Windows causes application crash

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Unplanned

Last Updated: 09 Apr 2026 08:31 by Lance

Lance

Created on: 09 Apr 2026 08:31

Category: ComboBox

Type: Bug Report

ComboBox: [WinUI] Interacting with the ComboBox inside RadCollectionView using a mouse pointer on Windows causes application crash

having a combobox inside the collectionview, click on the combo to open, then click again on the same location where you clicked to open the combo and exception occurs.

this is the stack trace:

 at WinRT.ExceptionHelpers.<ThrowExceptionForHR>g__Throw|38_0(Int32 hr)
   at ABI.Microsoft.UI.Input.IGestureRecognizerMethods.ProcessDownEvent(IObjectReference _obj, PointerPoint value)
   at Microsoft.UI.Input.GestureRecognizer.ProcessDownEvent(PointerPoint value)
   at Telerik.Maui.NativeGestureRecognizer.HoldGestureRecognizer_PointerPressed(Object sender, PointerRoutedEventArgs e)
   at ABI.Microsoft.UI.Xaml.Input.PointerEventHandler.Do_Abi_Invoke(IntPtr thisPtr, IntPtr sender, IntPtr e)