Maps passed to components throw exceptions when passed to other components

[phronmophobic]

(defui c1 [{}])
(defui c2 [{ :as m}]
  (prn "hi")
  (c1 m))
(ui/bounds
 (c2 {})) ;; class ui.membrane_ui.C2 cannot be cast to class clojure.lang.IEditableCollection