This problem can be easily demonstrated by looking at the page on the demonstration page, and then copying and pasting the same code into the kendo dojo.
The official demonstration page displays the buttons like so:

But the same code on the dojo displays the buttons like so:

As you can see, the demonstration page has a consistent style for all of the buttons, while the dojo page does not.
Both pages have the same classes on the icons:
The mixture of styles gives an unprofessional impression to the customer, and is preventing me from upgrading my codebase from version 2025.4.1321
For the simplest possible example, see this dojo snippet: https://dojo.telerik.com/aroNDBBv
The Kendo UI ListView widget supports setting the selected items via the select method. Up to version 2022.2.802, calling select() triggered a change event. This is no longer the case.
You can see the different behaviors in these two DOJOS: 2022.2.802 vs 2023.1.117 (the item gets selected after a second to make sure the dataSource has finished loading).
Add a hidden input to store the current value in it at all times, and a visible display input that has the month/day/year or current value displayed in it; it solved all of the issues and is currently implemented on numerous other Kendo form input controls.
This will make the DateInput compatible with JQuery Unobtrusive Validation.