Spinner Bug? calling after select without click

Put a button to call Spinner dropdown (only call on click button)
When the app start in companion or installed, the spinner show the element dropdown without be called ( i put and show alert on after select method of spinner to confirm this).
in time,
When the spinner have only one item ( like the about application in kodular options menu) this cant be called more than 1 time, staying unfeasible use then in this situation.
I want to ask if is was bug or what i have to do, (i dont wanna use the prompt option because is have to at least 2 itens in elements of spinner and the first is disabled).

the spinner works like that (unfortunately) and my suggestion is, use something like below

select an option
option 1
option 2