diff --git a/addons/account/static/src/js/account_reconciliation_widgets.js b/addons/account/static/src/js/account_reconciliation_widgets.js
index aa58012dd8a..453bd4149a5 100644
--- a/addons/account/static/src/js/account_reconciliation_widgets.js
+++ b/addons/account/static/src/js/account_reconciliation_widgets.js
@@ -453,6 +453,8 @@ var abstractReconciliationLine = Widget.extend({
 
     start: function() {
         var self = this;
+        // fail silently if reconciliation widget is removed (eg. mode is changed)
+        var parent = this.getParent();
         return self._super().then(function() {
 
             // no animation while loading
@@ -468,8 +470,8 @@ var abstractReconciliationLine = Widget.extend({
                 return $.when(self.render()).then(function(){
                     self.is_consistent = true;
                     // Make an entrance
-                    self.animation_speed = self.getParent().animation_speed;
-                    self.aestetic_animation_speed = self.getParent().aestetic_animation_speed;
+                    self.animation_speed = parent.animation_speed;
+                    self.aestetic_animation_speed = parent.aestetic_animation_speed;
                     if (self.context.animate_entrance) {
                         return self.$el.stop(true, true).fadeIn({ duration: self.aestetic_animation_speed, queue: false }).css('display', 'none').slideDown(self.aestetic_animation_speed);
                     }
@@ -2293,13 +2295,19 @@ var manualReconciliation = abstractReconciliation.extend({
         animate_entrance = defaultIfUndef(animate_entrance, true);
         var self = this;
         var displayed_collections = self.getDisplayedCollections();
+        var plural = { 'customer': 'customers', 'supplier': 'suppliers', 'account': 'others' };
 
         self.updateProgressbar();
 
+        // number of reconciliation items already displayed
+        var num_child_displayed = self.getChildren().length;
+
         // Remove children that should not be displayed
         if (self.mode !== 'all') {
             _.each(self.getChildren(), function(child) {
-                if (child.data.reconciliation_type !== self.mode) {
+                var type = plural[child.data.reconciliation_type];
+                if (type !== self.mode) {
+                    num_child_displayed--;
                     child.$el.slideUp(self.aestetic_animation_speed, function(){ child.destroy() });
                     child.data.displayed = false;
                 }
@@ -2312,7 +2320,7 @@ var manualReconciliation = abstractReconciliation.extend({
         var items_to_display = _.foldl(displayed_collections, function(prev, current){ return prev.concat(current.items) }, []);
         // Filter out those which are already displayed
         items_to_display = _.filter(items_to_display, function(item) { return item.displayed === false; })
-            .slice(0, self.num_reconciliations_fetched_in_batch - self.getChildren().length);
+            .slice(0, self.num_reconciliations_fetched_in_batch - num_child_displayed);
         _.each(items_to_display, function(item){
             children_promises.push(self.displayReconciliation(item, animate_entrance));
         });