Update bound parameter value without refreshing dashboard

Hi,

I have a tree view component with this bound parameter:

When an item in the Tree is selected, I want the parameter "userSelection" to update accordingly, for this reason I've set it to refresh once an item is selected.

The problem is that all the parent items the user opened to get to the selected item get closed once the dashboard gets refreshed, but I can't find a way to update "userSelection" without refreshing.

The only workaround I found is to save the parameter value into a variable, but it can be only accessed by components since I'm in a component service (I'm using assemblies).

So, do you know any way to save the value into "userSelection" parameter without refreshing? (I've already tried using SelectionChangedTaskInfo but it doesn't work)

Thank you.