2D RigidBody + Continuous Collision + IsTrigger = Doesn't work

I've noticed that if you use Continuous Collision Detection, on a dynamic 2d rigidbody + set the collider to isTrigger, it doesn't get the same precision as it would with a non-trigger collider.

With the non-trigger collider, I tested fast objects going through a thin wall and they always hit the wall.
With the isTrigger collider, I did the same test and the OnTriggerEnter2D function doesn't get called all the times.

Is it a bug? is it expected? is there any other way to achieve the "continuous detection with isTrigger" behavior?

Sending a screenshot of the bullet components as attachment.

 

Any chance of a mod moving my thread to "Physics" forum? I just noticed that this question might fit there better.