NVIDIA GameWorks Integration

I’m having a problem with UE4 and Hairworks for sometime now.
Both in FurViewer and AnimBP, the hair move realistically with my character.
When I try it in game though, the hair move slowly as if they have less gravity.
What I mean is that they stay more time in air and they follow slowly my character’s animations.
Is there an option somewhere or is common with UE4 and Nvidia Hairworks?

*For some reason I can’t create a new thread , so that’s why I post it *