Grid's groupHeaderTemplate does not render html elements as expected

[iordanGrancharov]

Bug report

When a groupHeaderTemplate is defined with HTML, and a groupHeaderColumnTemplate is defined, the groupHeaderTemplate will return the stringified version of the template.

Note: The groupHeaderTemplate is encoded only when a griupHeaderColumnTemplate is defined.

Reproduction of the problem

1.Go to Kendo UI Dojo.

Current behavior

The groupHeaderTemplate is rendered as a sanitized string

Expected/desired behavior

The groupHeaderTemplate is to be rendered as a Checkbox element and a string

This is a regression introduced with Kendo 2024.3.806

Environment

• Kendo UI version: 2024.3.806
• Browser: [all]