Dropdown with label and value dynamic is not working

When I create a dropdown I can use a list with "label" and another list with "value". It is working well.

But, when I create a similar dropdown and try to fill these lists dynamically, using an APP State Variable, I can´t do it. The option "List Contains Item" is disabled for both options (label and value).

Is it a bug or am I wrong at any point?

Thanks.