The discord mod OmegaSkynet was working with me to try and fix my game from falling through the floor.We have cleared my cache and got me loading back in because i was having a sub process issue . we have sorted my setting as well. its only when im moving in a vehicle at high speeds that this is happening. I drove through to Paleto and fell through multiple times. Then went back on my self to make sure its not the world loading in. but i still fell through the map. We tested this many times and fell through alot of times.
Thank you in advanced
This is video of it happening
This is another video but when i fell i open my F8 menu