Comment by Izkata

The description is out of order and I'm just going to assume "corruption" actually means "invalid data":

Memory leak -> dropped cache. Then because something that was dropped in that cache is still being viewed it has to regenerate it and that triggers a re-render. Then based on something I've seen in a game, a re-render drops the scroll location and renders at the top, and if your finger moves at the exact right moment it repopulates x1 and y1 at the same timestamp it populates x2 and y2, resulting in infinite velocity.