[Combobox] tabbing out should not select a value

[svetq]

Describe the bug
Using a ComboBox with suggest and allowCustom options set to true. When typing in the input a value that exists as an option but with a different case and then tabbing out should not select a value from the list.

To Reproduce
https://stackblitz.com/edit/angular-aclwfy?file=src%2Fapp%2Fapp.component.ts

Expected behavior
The desired behavior is currently demonstrated by the AutoComplete. Here is an example demonstrating the ComboBox and AutoComplete:
https://stackblitz.com/edit/angular-aclwfy?file=src%2Fapp%2Fapp.component.ts