use forked rum

src/main/frontend/extensions/code.cljs

@@ -286,7 +286,11 @@
                       (when-let [textarea (rum/ref-node state textarea-ref-name)]
                         (gobj/set textarea "defaultValue" code)
                         (gobj/set textarea "value" code))))
-                  state)}
+                  state)
+   ;; codemirror need to be re-rendered to get the new pos_meta
+   :did-update (fn [state]
+                 (load-and-render! state)
+                 state)}
   [state _config id attr code _theme _options]
   [:div.extensions__code
    (when-let [mode (:data-lang attr)]