tree jumping up back when scrolling down on touch devices

Steps to Reproduce

run the attachment (tree-touch-scroll-error.zul) on a touch device (or emulated in chrome)

Current Result

scroll down -> jumps back up

tree-jumping-back-to-top.mp4

Expected Result

when scrolling down stay at position

Debug Information

happens also on hybrid touch devices (notebooks with touch screen)

Workaround