Triggers not being called

I've got a simple scene with a plane for the ground, a rigidbody box collider that moves around based on user input, and a static trigger. The first time my collider moves into the trigger I get OnTriggerEnter, OnTriggerStay, and OnTriggerExit notices. The second time my collider enters the trigger, nothing happens.

If I have three triggers, I still only get notices for the first trigger that is entered.

According to the collision matrix, Static Triggers and Rigidbody Colliders should cause trigger notices (and it does, the first time, but never after that).

Is this a bug, or is there something I'm missing?

Make sure that the Console does not have "Collapse" turned on, as it will filter out repeat messages.

Try to use a BoxCollider (not the default MeshCollider) and give it some height/depth under your plane.