Bug report

When submitting a form, its data is being sent multiple times to the backend.

Check the example on ticket 1468553.

Reproduction of the problem

1. Open the example attached in ticket 1468553
2. Click on one of the two buttons and fill the form that appears in the Window
3. Open the browser's network tab and submit the form.
4. Multiple requests with the form's data are sent to the controller

Current behavior

Once submitted, the form's data is sent multiple times to the backend

Expected/desired behavior

Form's data should be sent to the controller only once

Environment

• Kendo UI version: 2020.2.513
• jQuery version: x.y
• Browser: [all]