First of all, this is only a demo and the game already runs far better than Forza Horizon 3 for which I am very thankful. I´m playing with most of the settings on high, but being able to constantly hold the 60 fps is a pleasure to the eye. But while I was driving around and doing the things one usually tends to do in this game I was able to notice some things that shouldn´t be normal. The biggest issue that I was able to notice was the long texture loading time that showed up when coming to a constant halt. Textures needed a fair amount of seconds to fully load. Yesterday I experienced a far more dramatical occurence of this problem when whole sections of the map started to dissapear in front of me, letting me smash in an invisible wall and making me static for several seconds when trying to drive through these sections.
My drivers are up to date and I know that I´m not the only one with this problem which is a bit of a pity with such a great running game.
Here are my pc´s specs:
GPU : NVIDIA GeForce GTX 970 ( I know, it´s a bit older, but it still does its job)
CPU: Intel Core i5-4690K
Memory: 12 GB DDR3
Mainboard: ASUS H97-Plus
HDD: (OS and Game installed on it)
Hitachi HDT721010SLA360 (3 GB/s)
If anyone has an idea of how to fix this small but annoying issue, just let me know, because I would be very thankful for any advice 
-sheers