OnTrigger problem

I m developing a car racing in xz plane. I instantiating different tracks when my car passes through a certain point where i place a box collider which is on triger,when the car passes through this collider track instantiated but the problem is when car passes through this collider it waits for 2-3 seconds then track instantiated and car moves.I want car smoothly pass through collider without stopping.how can i fix it?

have you checked “is trigger” to your box collider ?

please check your PM