Auto layout doesn't work for instance

Hi,
I’ve created a dropdown menu using variant function,
and created a component contained 2 dropdown menu for my homepage’s content.
Idealy, when I open the upper one, the contents of the menu will be shown, so the lower one should goes lower.
to achieve this , I added auto layer to those 2 menus(in the same component).
the auto layer do work in the component level,
but when I insert an instance to the other frame, it suddenly doesn’t work.

anyone knows what might I be doing wrong?
this is my file(the component’s name is “page content”, and the instance is in the “local homepage” frame)