Prevent input after reaching maxitems limit

[brabadu]

I've set maxitems number to 1. When I enter first element and it turns to brick focus stays in the fcbkcomplete input and you still can type text there.

I think expected behavior should be preventing any text input after reaching maxitems limit except backspace to delete existing elements.

[RupW]

This confused me with the online demo too - it's not obvious it's set to maxItems: 2 so I thought it was broken when the third item didn't autocomplete.