When a button is added to a ButtonGroup (e.g., Button 1), and then another button (Button 2) is added, the button counter fails to increment correctly. Instead of displaying the number 2 for Button 2, it retains the number of the button within the ButtonGroup (e.g., number 1)

Steps to reproduce the behavior:

1. Go to 'https://function-adminportal-test.shesha.dev/shesha/forms-designer?id=ab1f059d-2476-41b9-ad13-0d1e1497ea85'
2. Click on buttonGroup component
3. On the properties panel, click on Customise Button Group
4. Click on Add Group button
5. Click on Add New Item
6. Click on Add New Item again
7. Actual Results: The second button retain the button number for the button inside the buttonGroup

Expected behavior
The button number should increment every time