I have a TelerikTimePicker component and I have set the ShowClearButton="true". The Value property of the component is bound to a nullable DateTime variable (e.g., DateTime? MyTime). If I first input/select a valid time and then clear the value (using the "x" button in the input field), the component is highlighted in red because the .k-invalid class has been added to the HTML markup. However, the value in the TelerikTimePicker is not actually invalid because a null value is allowed.
This is very similar to this issue for the TelerikDateTimePicker: https://feedback.telerik.com/blazor/1660917-datetimepicker-should-not-get-red-border-when-bound-to-nullable-datetime-and-the-input-is-empty