Hi Durai,
Thanks for the patience.
On further validation, we have confirmed the script errors as a bug and logged the defect report “Drag and drop to Listbox causes script errors”. Thank you for taking the time to report this issue and helping us improve our product. At Syncfusion, we are committed to fixing all validated defects (subject to technical feasibility and Product Development Life Cycle ) and the fix for this defect will be included in our weekly patch release which is expected to be rolled out on October 20th, 2021.
You can now track the current status of your request, review the proposed resolution timeline, and contact us for any further inquiries through this link.
Until then we value your patience
Regards,
Jagadesh Ram