If you have seperate pop ups each with a a repeating group and both are set to scroll to last item. If you click for pop up 1 the repeating group it will scroll like it is supposed to. When you hide popup 1 and click it again it works fine.
If you scroll higher in popup 1 and then hide popup 1 and open popup 2, then when you show popup 1 again the scroll to bottom feature does not work. It breaks it. Annoying if you have two or more pop ups with scrolling repeating groups in them.