fix(Prediction): child colliders now have the correct layer too

Assets/Mirror/Components/PredictedRigidbody/PredictedRigidbody.cs

@@ -133,6 +133,11 @@ protected static GameObject CopyRelativeTransform(GameObject source, Transform s
             child.transform.localPosition = sourceChild.localPosition;
             child.transform.localRotation = sourceChild.localRotation;
             child.transform.localScale = sourceChild.localScale;
+
+            // assign the same Layer for the physics copy.
+            // games may use a custom physics collision matrix, layer matters.
+            child.layer = sourceChild.layer;
+
             return child;
         }