Oculus Quest hand grabber collider questions

Hey guys,

I'm currently trying to create a nail and hammer for a bigger project.

The nail contains three child colliders, under the main parent. And the hammer also contains three colliders under the main parent.

When I putting a nail on the table, and hold a hammer on hand and hit the nail, both objects could detect the collision (I set them to change the color when the hammer hit nail). And if I hold a nail to hit a hammer it also works.

[Question Start]: But when I hold a hammer on the right hand and hold the nail on left when I trying to using the hammer hit the nail, there seems to be no detection (color not changing). I don't know if this is because of some weird logic of OVRgrabber or it's because I'm using the CustomHand from Oculus Integration.

Anyone could help me or give me any suggestions?

Best,