requestAnimationFrame not fired during scroll in Chrome

Parallax on Chrome (mac) out of a sudden started to cause performance issues. This used to work smoothly, as for example Firefox is still doing.

It seems like the requestAnimationFrame stops being called during scroll. What could be the reason for this?

I am using requestAnimationFrame, transform3d, will-change. See the site on its temporarily location: http://www.doordata.nl/2invision2/