Issue when use "setSelected"

[TillMoss]

Hi I have a problem with a function "setSelected" I have a menu with 4 items. 4 Item is "Choose one for me" and the first is "Movie". When I tap on "Choose one for me" this call a function and in this function there is "menuDropDown.setSelected(index: 0)".
I get the problem like the images attached. The arrow is not near "Movie"