Could you please provide detailed information on the following subjects:
- Which version of Telerik UI for ASP.NET and .NET Framework is used in the application?
- Under which browser the problem occurs?
- What are the local and remote server configurations? Are they differ in some way?
- Are there any errors thrown on the page where the Drag&Drop is not working? If so, could you please provide the exact error message and the stack trace.
- Could you try to isolate the issue in a sample project and send it so we can examine and debug it locally?
Looking forward to hearing from you,
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