Hi! I currently have an event trigger object that has the Box Collider Component with IsTrigger = true. Everything works fine in the runtime of Unity Engine (PlayMode?). But When I build the project and run the executable application, all Colliders cannot detect events by the OnTriggerEnter() function. To be specific, the idea of this trigger object is that: when my cars pass by it, it can accelerate the speed of the car. So, I have the Inspector and the Script here for this event trigger object: I also have my cars Inspector here: If there is more information that I need to provide, please let me know. Thanks!