Thank you for writing.
I have tested this scenario and on my end it behaves correctly. A possible reason for which the event does not fire is if the document does not exist in the form's constructor. This is why, I would recommend that you subscribe to the event in the form Shown
event (refer to the attached video). If this still does not work for you, please provide me with a sample project demonstrating the issue, so I can investigate it locally and provide you with adequate support.
I am looking forward to your reply.
All the best,
the Telerik team
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