If you select a character (currently logged in e..g) and scroll to the middle.
Then select another character:
The scrollbar slider stays in the middle (at the position where it was last scrolled to) but the list contents are updated and starting at the top.
Maybe call IIFA_GUI_ListHolder_Slider:SetValue(0) if one changes the shown character/bank etc. from the dropdown above. This will update the slider to the top as well and shouldn't issue a refresh or something.