Rigidbody collision problem (see screenshot and video)

Unity Engine
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1

Hi. I have a target consists of five steel plates of complex shape swinging on the one axis.
Each plate is a Rigidbody with HingeJoint component.
Each plate contains several convex mesh colliders (see screenshot).
You can see the gaps between colliders of the different plates.
But when one plate is moving – its affects others. In most cases – the central plate affects bottom plates.
It’s impossible but true. Again – all colliders are convex. Their shapes are clearly visible on the screenshot.
Why it happens and how to fix it ? Thanks

2

Try adjusting the contact offset in the colliders:

3

Default values were 0.01. Changed to 0 for all colliders. Didn’t help a much.