info.magnolia.jcr.wrapper.ChildWrappingNodeWrapper should wrap every returned node, but it doesn't wrap nodes returned by methods getParent and getAncestor.
Also it doesn't wrap session which is returned by method getSession. So if we call wrappedNode.getSession.getNode returned node is not wrapped. Similarly applies to workspace.

info.magnolia.jcr.wrapper.PropertyAndChildWrappingNodeWrapper should wrap every returned property, but it doesn't wrap nodes returned by setProperty(*) methods.

info.magnolia.jcr.wrapper.WrappingPropertyWrapper should also wrap every returned node and property not only nodes and properties acquired via references.