Hello Gary and Kent! I don’t know if this is a valid solution ( I’m a blender noob), but I had a similar issue with the very first coin. In my case, it looks like a precision issue with the collision. Adding a solidify modifier to the chest’s rigidbody mesh gave it enough thickness to register the coin hits.
If it’s anything like Unity collision, the rigid body sometimes passes through the collision object faster than the physics system can detect it. Making the object thicker gives it a better chance of catching them.
