Does not scroll to the top of the solution not the time to expand grouping android development ExpandableListView

// set the packet to the clicked event ExpandableListView 
binding.elvContactGroup.setOnGroupClickListener {parent, _, groupPosition, _ -> 
    IF (parent.isGroupExpanded (groupPosition)) { 
        parent.collapseGroup (groupPosition) 
    } the else { 
        parent.expandGroup (groupPosition, to false) // The second parameter passed false, no animation 
    } 
    true // returns true if the event has consumption, to tell the system does not generate a default action. 
}