diff --git a/app/assets/javascripts/app/models/_application_model.coffee b/app/assets/javascripts/app/models/_application_model.coffee
index ca9640fee..8a0830c05 100644
--- a/app/assets/javascripts/app/models/_application_model.coffee
+++ b/app/assets/javascripts/app/models/_application_model.coffee
@@ -869,5 +869,7 @@ set new attributes of model (remove already available attributes)
     @configure_attributes = $.extend(true, [], @org_configure_attributes)
 
   @resetCallbacks: ->
-    @SUBSCRIPTION_ITEM = {}
-    @SUBSCRIPTION_COLLECTION = {}
+    if @SUBSCRIPTION_ITEM
+      @SUBSCRIPTION_ITEM = {}
+    if @SUBSCRIPTION_COLLECTION
+      @SUBSCRIPTION_COLLECTION = {}
diff --git a/app/views/tests/model_binding.html.erb b/app/views/tests/model_binding.html.erb
new file mode 100644
index 000000000..4748a1f1b
--- /dev/null
+++ b/app/views/tests/model_binding.html.erb
@@ -0,0 +1,16 @@
+
+<link rel="stylesheet" href="/assets/tests/qunit-1.21.0.css">
+<script src="/assets/tests/qunit-1.21.0.js"></script>
+<script src="/assets/tests/model_binding.js"></script>
+
+<style type="text/css">
+body {
+  padding-top: 0px;
+}
+</style>
+
+<script type="text/javascript">
+</script>
+
+<div id="qunit" class="u-dontfold"></div>
+
diff --git a/config/routes/test.rb b/config/routes/test.rb
index 8ccccd6f6..1c906fdfa 100644
--- a/config/routes/test.rb
+++ b/config/routes/test.rb
@@ -3,6 +3,7 @@ Zammad::Application.routes.draw do
   match '/tests_core',                    to: 'tests#core',                       via: :get
   match '/tests_ui',                      to: 'tests#ui',                         via: :get
   match '/tests_model',                   to: 'tests#model',                      via: :get
+  match '/tests_model_binding',           to: 'tests#model_binding',              via: :get
   match '/tests_model_ui',                to: 'tests#model_ui',                   via: :get
   match '/tests_form',                    to: 'tests#form',                       via: :get
   match '/tests_form_tree_select',        to: 'tests#form_tree_select',           via: :get
diff --git a/public/assets/tests/model_binding.js b/public/assets/tests/model_binding.js
new file mode 100644
index 000000000..e102a60a5
--- /dev/null
+++ b/public/assets/tests/model_binding.js
@@ -0,0 +1,52 @@
+window.onload = function() {
+
+test("model bindings and rebinding", function() {
+
+  var callback_count1 = 0
+  var callbacks = App.Template._callbacks
+  Object.keys(callbacks).forEach(function(key) {
+    callback_count1 = callback_count1 + callbacks[key].length
+  });
+  equal(callback_count1, 2)
+
+  equal(App.Template.SUBSCRIPTION_COLLECTION, undefined)
+
+  App.Template.clearInMemory()
+
+  equal(App.Template.SUBSCRIPTION_COLLECTION, undefined)
+
+  var callback_count2 = 0
+  callbacks = App.Template._callbacks
+  Object.keys(callbacks).forEach(function(key) {
+    callback_count2 = callback_count2 + callbacks[key].length
+  });
+  equal(callback_count2, callback_count1)
+
+  var render = function() {}
+  var subscribe_id = App.Template.subscribe(render, {initFetch: true})
+
+  ok(_.isObject(App.Template.SUBSCRIPTION_COLLECTION))
+  ok(!_.isEmpty(App.Template.SUBSCRIPTION_COLLECTION))
+
+  var callback_count3 = 0
+  callbacks = App.Template._callbacks
+  Object.keys(callbacks).forEach(function(key) {
+    callback_count3 = callback_count3 + callbacks[key].length
+  });
+  equal(callback_count3, 6)
+
+  App.Template.clearInMemory()
+
+  ok(_.isObject(App.Template.SUBSCRIPTION_COLLECTION))
+  ok(_.isEmpty(App.Template.SUBSCRIPTION_COLLECTION))
+
+  var callback_count4 = 0
+  callbacks = App.Template._callbacks
+  Object.keys(callbacks).forEach(function(key) {
+    callback_count4 = callback_count4 + callbacks[key].length
+  });
+  equal(callback_count4, callback_count3)
+
+});
+
+}
diff --git a/test/browser/aab_unit_test.rb b/test/browser/aab_unit_test.rb
index fab47d2de..ea63b0a47 100644
--- a/test/browser/aab_unit_test.rb
+++ b/test/browser/aab_unit_test.rb
@@ -28,6 +28,13 @@ class AAbUnitTest < TestCase
       value: '0',
     )
 
+    location(url: browser_url + '/tests_model_binding')
+    sleep 8
+    match(
+      css: '.result .failed',
+      value: '0',
+    )
+
     location(url: browser_url + '/tests_model_ui')
     sleep 8
     match(