Radio Button validation fails when a selection is present

[aleksandarevangelatov]

Bug report

RadioButton for ASP.NET MVC validation fails when a selection is present. This is a regression introduced with v2021.1.119

Reproduction of the problem

Validation for a Radio Button defined the following way fails upon form submission

public class IndexViewModel
{
    public bool MyBoolProperty { get; set; } = false;
}

<form id="exampleForm">
	<div class="form-group">
		@(Html.Kendo().RadioButtonFor(m => m.MyBoolProperty).Label("Yes").Value(true))
		@(Html.Kendo().RadioButtonFor(m => m.MyBoolProperty).Label("No").Value(false))
	</div>
	<button type="submit" class="k-button">Submit</button>
</form>


<script>
	$(function () {
		const $form = $('#exampleForm');
		const validator = $form.kendoValidator().data('kendoValidator');
		$form.submit(function (e) {
			e.preventDefault();
			console.log(validator.validate());
		});
	});
</script>

Expected/desired behavior

Validation should pass if a selection is made

Workaround

Adding the k-radio-list class to the Radio Button container can be used as a workaround until the issue is resolved:

<div class="form-group k-radio-list">
    @(Html.Kendo().RadioButtonFor(m => m.MyBoolProperty).Label("Yes").Value(true))
    @(Html.Kendo().RadioButtonFor(m => m.MyBoolProperty).Label("No").Value(false))
</div>

Environment

• Kendo UI version: 2021.1.224
• Browser: [all]