RigidBody affects others even when they don't collide
I'm trying to understand RigidBody's. I've created a few and set their collision shape and margin.
They all start out sleeping, but when I wake up one, they all wake up if they are close to each other, but not actually touching.
In the pic you can see the 3 collision shapes don't overlap and in the CollisionShape panel you can see Margin is 0.001.
That tiny dark read dot is 0.01, so it's 10x the margin. Yet when I wake up one, they all fall.
If I move them further apart, the others aren't affected.
Is there another margin or something else involved here?
I'm trying to make a brick wall where you can remove the bricks one at a time to find a treasure behind, but if they are close enough together to look right, they all wake up when one gets touched and fall apart.