ENG:

(forgive my english, i used google translator).

As seen in the image, for some reason sometimes does not load the full hair of Geralt in HairWorks mode. It usually happens after a loading screen, or after a dialogue, sometimes it loses little by little when entering and leaving load screens, or sometimes starts the game with little hair.
I have a GTX 1060 6GB, with updated drivers, I'm playing with Hairworks to the fullest.
I have not noticed this problem with beasts like wolves or griffins.

ESP:

Tal como se ve en la imagen, por algún motivo a veces no carga el cabello completo de Geralt en modo HairWorks. Por lo general ocurre después de una pantalla de carga, o después de un dialogo, a veces lo va perdiendo de a poco al entrar y salir de pantallas de carga, o a veces inicia el juego sin cabello.
Tengo una GTX 1060 6GB, con los drivers actualizados, estoy jugando con Hairworks al máximo.
No eh notado este problema con bestias como lobos o grifos.

This looks like a driver issue to me. You might consider changing them. If you're using the newest, try installing older ones.

install the new drivers, but the problem persists. (09/19/2018, v411.63)

Standard driver uninstall leaves behind many leftovers and as a result may not solve driver related problems. You can try to use Display Driver Uninstaller (https://www.guru3d.com/files-details/display-driver-uninstaller-download.html) to completely remove all remnants of the old drivers. Also when you install new ones remember to check the clean install box. Moreover try to skip on everything that's not the driver and PhysX Software. You can choose which components to install when you select custom option in the installer.