was recently improved and new functionality was added to the control. This might be the root of the issue.
Can you set the following property:
RadDragAndDropManager.ExecutionMode = DragExecutionMode.Legacy;
and let me know if that fixes the issue. If it doesn't help, can you please send us a sample project or a code snippet illustrating how you implement the drag/drop logic and in which event you close the gallery popup?
Thank you in advance for your cooperation on the matter.
the Telerik team
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