TT Force Feedback Glitch (BUG)

Is anyone else getting reduced force feedback on their wheel after doing 3-5 laps around TT. The first few laps you can feel the traction zones on the steering but after a few laps it seems the FFB strength goes down considerably. I change the car and the same thing happens again. I get the feeling that the tires are worn but it doesnt effect lap times. It does effect the steering input as it becomes more sensitive and slidy.

Platform: PS4
Wheel: T300 

Let me know if other's are encountering this too.