diff --git a/addons/web_kanban/static/src/js/kanban_view.js b/addons/web_kanban/static/src/js/kanban_view.js
index a5d16628805..29557c2bec9 100644
--- a/addons/web_kanban/static/src/js/kanban_view.js
+++ b/addons/web_kanban/static/src/js/kanban_view.js
@@ -250,7 +250,7 @@ var KanbanView = View.extend({
                     def = dataset.read_slice(self.fields_keys.concat(['__last_update']), { 'limit': self.limit });
                 }
                 return def.then(function (records) {
-                    self.dataset.ids.push.apply(self.dataset.ids, dataset.ids);
+                    self.dataset.ids.push.apply(self.dataset.ids, _.difference(dataset.ids, self.dataset.ids));
                     group.records = records;
                     group.dataset = dataset;
                     is_empty = is_empty && !records.length;