diff --git a/web/app/assets/javascripts/react-components/MediaControls.js.jsx.coffee b/web/app/assets/javascripts/react-components/MediaControls.js.jsx.coffee
index 679b4f761..b504daa3b 100644
--- a/web/app/assets/javascripts/react-components/MediaControls.js.jsx.coffee
+++ b/web/app/assets/javascripts/react-components/MediaControls.js.jsx.coffee
@@ -35,12 +35,17 @@ mixins.push(Reflux.listenTo(JamTrackStore, 'onJamTrackStateChanged'))
     if window.unloaded
       return
 
+    if window.closed
+      return
+
     @monitorControls(@state.controls, @state.mediaSummary, jamTrackState)
     @setState({jamTrackState: jamTrackState})
 
   onMediaStateChanged: (changes) ->
     if window.unloaded
       return
+    if window.closed
+      return
 
     if changes.playbackStateChanged
       if @state.controls?
diff --git a/web/app/assets/javascripts/react-components/PopupMediaControls.js.jsx.coffee b/web/app/assets/javascripts/react-components/PopupMediaControls.js.jsx.coffee
index 2df3e8cc1..3f4dc1230 100644
--- a/web/app/assets/javascripts/react-components/PopupMediaControls.js.jsx.coffee
+++ b/web/app/assets/javascripts/react-components/PopupMediaControls.js.jsx.coffee
@@ -63,6 +63,8 @@ mixins.push(Reflux.listenTo(UserStore, 'onUserChanged'))
     if @unloaded
       #console.log("PopupMediaControls unloaded. ignore onMixersChnaged")
       return
+    if window.closed
+      return
     @setState(@updateFromMixerHelper(mixers, session))
 
 
@@ -71,6 +73,9 @@ mixins.push(Reflux.listenTo(UserStore, 'onUserChanged'))
       #console.log("PopupMediaControls unloaded. ignore onMixersChnaged")
       return
 
+    if window.closed
+      return
+
     if changes.currentTimeChanged && @root?
       @setState({time: changes.time})
 
@@ -79,6 +84,9 @@ mixins.push(Reflux.listenTo(UserStore, 'onUserChanged'))
       #console.log("PopupMediaControls unloaded. ignore onMixersChnaged")
       return
 
+    if window.closed
+      return
+
     logger.debug("PopupMediaControls: jamtrack changed", changes)
     @setState({jamTrackState: changes})