Implicit cover of nested array not working with arbitrary variables

CREATE INDEX `ix2` ON `default`(distinct array (distinct array `p`.`relevancia` for `p` in `c`.`palabras` end) for `c` in `conclusiones` end) ;

EXPLAIN SELECT META().id FROM default AS r WHERE ANY c IN r.conclusiones SATISFIES ANY p IN c.palabras SATISFIES p.relevancia > 50 END END;

EXPLAIN SELECT META().id FROM default AS r WHERE ANY conclusion IN r.conclusiones SATISFIES ANY p IN conclusion.palabras SATISFIES p.relevancia > 50 END END;