In Multicombobox choosing combo element using keyboard is broken when data source contains more than one duplicate value of a property used as a textField.

Steps to reproduce:

1. Open https://stackblitz.com/edit/react-afvets8p?file=app%2Fapp.tsx

2. Try to select the 4th value using the arrow keys.

It's impossible because there are two items with the name 'Guy Wooten,' and this field is used as the textField.