Bug report

The selectedIndices property of the ButtonGroup returns incorrect indices.
The issue is a regression introduced with v2023.1.117

Reproduction of the problem

1. Run this dojo

Current behavior

1. Click on the Get Selected indices button - no indices are returned.
2. Deselect the selected button and click on the Get Selected indices button again.
3. The selectedIndices property indicates the first button is selected.

Expected/desired behavior

Correct indices of selected buttons should be returned.

Environment

• Kendo UI version: 2023.1.117
• Browser: [all]