Fall through or look through the map in GTA V?

I recently switched from PS4 to PC and I currently have problems looking through the map at high speed in GTA V or even falling I've looked elsewhere for answers but I never think that my Cpu is bad when I hear someone playing with an AMD phenomenon. And it can't be the graphics card either because I can play most games stable with 120FPS on high settings

My CPU: AMD Ryzen 3 3300G My hard disks: 240GB Kingston SSD, and any other 1TB hard disk My graphics card: MSI 1660 TI Ventus

The game is played on the SSD and the FPS on ultra settings are also stable (60FPS) but I still fall through the card. Unfortunately, I can't show a picture, but you should know what it looks like.

I would say it is unfortunately due to the CPU

No, actually not because it is not yet fully used and I just noticed that post-processing was deactivated and that was the reason