ScrollUp ScrollDown logic not working on mobile device

I’ve added some scroll logic which works fine when viewing the prototype on a desktop, however it doesn’t get recognised when viewing the prototype on a mobile device. If I remove the logic the scroll events do actually work but only in the simplest way. It looks like mobile scroll events have needed some fixing before, but I’d suggest someone looks at this again.

I’m using Axure 8, but does anyone know if mobile scrolling is working OK in later versions?