Unreal Engine / Nvidia Hairworks in game problem

I’m having a problem with Unreal and Hairworks for quite some time now.
Both in FurViewer and Animation Blueprint, the hair are moving in a realistic way along with my character animation.
When I test the hair in game though, they move slowly , as if they have bigger gravity. What I mean is that the hair stay more time in air and they follow slowly my character’s movements, something that doesn’t happen in AnimBP. Is there an option or an import setting, or this is common with UE4?