Dropdown selection not preserving across apps

I’m trying to build a web app with multiple links at the top with the following layout:

App 1 App 2 App 3
dropdownlist1 dropdownlist2

I’ve added the drop-down lists to my index page, but whenever I select a different app, all the drop-down items reset back to the default selection, not what I selected before switching.

Is there a way to preserve drop-down selections across apps or do I have to use tabs?

Thank you