Try to find race condition.

app/assets/javascripts/app/lib/collection.js.coffee

@@ -89,6 +89,9 @@ class _Singleton
   reset: (params) ->
     console.log( 'reset', params )
 
+    # empty in-memory
+    App[ params.type ].refresh( [], { clear: true } )
+
     # remove permanent storage
     list = App.Store.list()
     for key in list
@@ -96,9 +99,6 @@ class _Singleton
       if parts[0] is 'collection' && parts[1] is params.type
         App.Store.delete(key)
 
-    # empty in-memory
-    App[ params.type ].refresh( [], { clear: true } )
-
     # load with new data
     @load(params)