When malli transforms a data structure, does it not preserve meta data? is this by design?

(require '[malli.core :as mc]
         '[malli.transform :as mt])

(def ^{:a 10} alist (list 1 2 3))

(meta (mc/decode [:vector int?] alist (mt/transformer (mt/json-transformer) (mt/string-transformer))) ) 
;=> nil