Why object destroyed after trigger exit?

Hey unity guys…

I hope you are fine…

My problem simply is that I have 2 objects, one with a collider with (is trigger) option set to (true), and the other one has a collider and a rigidbody with default settings for each one.
Now, when they collide each other, they do the expected, but when trigger exited the object (with collider and is trigger set to true) destroyed? why is that? and how I can prevent it?

Sorry for bad english if any…

Update:To make things clear I have the following:

Object A as parent>>Sphere collider with is trigger option set to true.

object B as child for A>>Box collider with is trigger option set to false.

Object C>>with regidbody and Spherecollider with is trigger option set to false.

now when C collide with A, the object A destroyed with its child B after C exit the trigger area.

My Conclusion(after many tests):If I set is trigger to true for an object, then no matter what you write in the OnTriggerEnter() event, it still that this object will disappear (destroyed) after collision, and I don’t know why?

The information you have given is not adequate to solve problem. Don’t bother about whether trigger is true or false. One thing is straight and forward you have to understand any object can’t be destroyed until and unless you are destroying it some where else. Try if you are accessing your object from some where else.