Clojurians Log v2

I've got this series of events and effects to interact with the Google Maps API:

(reg-event-db
 :config/save-map
 (fn [db [_ map]]
   (assoc db :config.geo/map map)))

(reg-event-db
 :map/update-map
 (fn [db [_ canvas lat-lng]]
   (let [Map (get db :config.geo/map)]
     (assoc db :map/current-view (Map. canvas (clj->js lat-lng))))))

(reg-event-fx
 :maps/set-current-center
 (fn [{:keys [db]} [_ new-center]]
   (let [new-coords (get-in db [:config.maps/coords new-center])]
     {:fx [[:dispatch [:map/update-map (gdom/getElement "map-canvas")
                       {:center new-coords
                        :zoom 13}]]]})))

(reg-event-fx
 :config/load-google-maps
 (fn [_ _]
   {:google-maps nil}))

(reg-fx
 :google-maps
 (fn [_]
   (js-await [_ (try (.load (Loader. #js {:apiKey api-key
                                          :version "weekly"}))
                     (catch js/Error e
                       (throw (ex-info "failed to load JS Maps API" {:cause e}))))]
             (js-await [lib (js/google.maps.importLibrary "maps")]
                       (dispatch [:config/save-map (gobj/get lib "Map")])))))

On various screens throughout my app, I am constructing a new map and rendering it. But if I want to see the change I expect, I have to click twice on a route before the change to the map takes. I'm guessing there's a bug in my code but I'd appreciate some insight. Should I perhaps instead just use the mutability provided by the Map class and update its state that way?