Hi.

When entering an invalid date in a DateTimePicker, the component will automatically revert the entered value back to its previous valid value.

I didn't expect this because the user may type in an invalid date, and continue to the next input control within the form, and not notice the error that was briefly displayed.

The issue can be reproduced in the DateTimePicker Demo here: https://demos.telerik.com/blazor-ui/datetimepicker/validation

Steps to reproduce:

1. Click in the day part of the date.

2. Enter 13

3. Enter 2100

4. Press the Tab key

5. Notice the date is automatically reverted (back) to 10/13/2019.

I expected the date to be set to 10/13/2100 with the input validation errors visible to the user after pressing the Tab key in step 4.

I've categorized this issue as a bug because otherwise, the form can be submitted with a value that the user did not enter.

If this behavior cannot be changed from being the default behavior, then there should be an option to prevent this behavior from happening.

Thank you.