[Inputs, DropDowns, DateInputs] Using custom validator on a FormControl component with input and calling a method on the value of the control throws an error

[zstoyanova9]

Describe the bug
When configuring a Kendo UI for Angular component that has an underlying input element as a FormControl and using a custom validator, in which a method is called for the value of this control, a "Cannot read properties of undefined (reading '{{name of method}}')" error is thrown in the console.

This is a regression introduced with v15.5.0.

To Reproduce
Open the following StackBlitz example that implements our TextBox component as a FormControl and observe the error in the console:
https://stackblitz.com/edit/angular-im2mgt-nl4jat

DateTimePicker example - https://stackblitz.com/edit/angular-bug-datetimepicker-xjnzga?file=src%2Fapp%2Fapp.component.ts

There is no such error when using the same configuration with the default HTML input element. Example: https://stackblitz.com/edit/angular-im2mgt-ugbjqg

Expected behavior
No error should be thrown when this configuration is used with a Kendo UI for Angular component.

Screenshots

[tswetti]

Fixed in v16.0.0