A few more observations playing with the PhysicsTunneling.zip Defold project:
- A dynamic collision object with restitution 1 that bounces on a static body with restitution 0 increases each bounce a little. A value of 1 should only retain the bounce height, not increase it.
- When setting frame cap to 20 the issue becomes much more pronounced, to the point at which the ball tunnels through the other side and disappears.
It seems to me this must be related to how Defold updates the physics?