7.4 Beta touchpad on XPS-13

I'm trying to run 7.4 Beta on a Dell XPS-13 (late 2016 model) and the touchpad works but it's very, very draggy- to the point where it's unusable. Curser tracks fine if I plug in a mouse.

Is there a workaround? The touchpad works perfectly under RHEL 7.3

Thanks.