meta.xml object is written into staging area twice

[priimak]

In DelegatingMarshallContext.java calling method

public static void processMarshalingTree(ObjectNode tree, Collection<? extends Marshaler<?>> marshalers,
           MarshalTarget marshalTarget) throws IOException {
       Objects.requireNonNull(tree);
       Objects.requireNonNull(marshalers);
       Objects.requireNonNull(marshalTarget);
       Marshaler<?> marshaler = findMarshalerForObjectNode(tree, marshalers);
       try (DelegatingMarshalContext marshalContext = create(marshaler, marshalers, marshalTarget)) {
           marshalContext.acceptTree(tree);
       }
}

results in object meta.xml written twice. First time it is written in method call marshalContext.acceptTree(tree) and second time when marshallContex is closed.