Subnautica VR doesn't launch : black "screen"

[Scythell]

Hello everyone :)

I have an annoying issue with this game (which seems fantastic by the way). As I said in the title, there is a black screen when I launch the game, after the "New game" menu selected. I didn't find that exact problem anywhere. In fact, the black screen is in the Oculus Rift and my PC shows the loading picture (I think, this is a ship crashing). And there are some black flashs on it.
I have to say I saw some topics including the topic "VR Troubleshooting" before but it didn't help me.

Here is what I use :

Oculus Rift + 2 Oculus Touch
Laptop Legion Y720
Intel Core i5-7300HQ
GeForce Nvidia 1060 6Go, 8Go RAM
Windows 10 64bits
DirectX 12
Subnautica on Steam VR

I believe the Oculus Touch are not fully compatible with this game but I'm not sure this is the issue. I recently cleaned my graphic card drivers and installed the lastest version, the version of Windows Update is the last too.
My configuration is not a war machine but I can play Skyrim and The Forest in VR without any troubles. When I launch the game on PC in non-VR mode, it works. I tried to save and to load the game in VR but same result. I also tried launching with "run as admin", to uninstall and install the game twice, to make sure the game launch with the Nvidia graphic card and not the HD Graphics or something. In the Nvidia pannel, I chose Subnautica and I set the setting to "always starts with Nvidia graphic card" , the laptop PC power settings are set to "performance" and not economy.

Hm... I'm not sure if I forgot something x) In any case, I would really like to play this game and I hope we could find a solution T_T

See you ;)

EDIT : strange... I launched the game and wait 10-15 mins (without the Rift x') ahah) and it seems to work. I can play but that's weird to have a black screen in the Oculus and a bugged picture on the laptop. I would like to understand this thing...