Index key starts with bucket alias, wrong index might be selected

CREATE INDEX ix5 ON default(orders.order_id);

-- The following two queries uses ix5 which is not right

EXPLAIN SELECT meta().id FROM default orders WHERE order_id = 10;

EXPLAIN SELECT meta().id FROM default orders WHERE orders.order_id = 10;

-- The following query is NOT uses ix5 which is right

EXPLAIN SELECT meta().id FROM default d WHERE order_id = 10;