In first, I want wold like to thanks this mode developer.
In other words: first-person view, you get into a minecart, approach the first start Track Ties, and if you were looking straight ahead, the camera will sharply rotate 90 degrees always to the right side. If you were looking left, the camera will sharply rotate forward; if looking right, the camera will rotate backward.
Please don't suggest the command:
/splinecartc config rotate_camera false
It does something completely different, I've tried this command. I simply want only the very first transition from regular rails to Track Ties to not rotate the camera, as it always does, but after that everything should work with "rotate_camera true"