diff --git a/modules/UI/recording/Recording.js b/modules/UI/recording/Recording.js
index 261687ff4..ecdb58355 100644
--- a/modules/UI/recording/Recording.js
+++ b/modules/UI/recording/Recording.js
@@ -21,6 +21,10 @@ import Feedback from '../Feedback.js';
 import Toolbar from '../toolbars/Toolbar';
 import BottomToolbar from '../toolbars/BottomToolbar';
 
+/**
+ * The dialog for user input.
+ */
+let dialog = null;
 
 /**
  * Indicates if the recording button should be enabled.
@@ -50,7 +54,7 @@ function _requestLiveStreamId() {
             "liveStreaming.streamIdRequired");
 
     return new Promise(function (resolve, reject) {
-        let dialog = APP.UI.messageHandler.openDialogWithStates({
+        dialog = APP.UI.messageHandler.openDialogWithStates({
             state0: {
                 html:
                     `<h2>${msg}</h2>
@@ -104,6 +108,10 @@ function _requestLiveStreamId() {
                     }
                 }
             }
+        }, {
+            close: function () {
+                dialog = null;
+            }
         });
     });
 }
@@ -117,7 +125,7 @@ function _requestRecordingToken () {
     let token = APP.translation.translateString("dialog.token");
 
     return new Promise(function (resolve, reject) {
-        APP.UI.messageHandler.openTwoButtonDialog(
+        dialog = APP.UI.messageHandler.openTwoButtonDialog(
             null, null, null,
             `<h2>${msg}</h2>
              <input name="recordingToken" type="text"
@@ -132,7 +140,9 @@ function _requestRecordingToken () {
                 }
             },
             null,
-            function () { },
+            function () {
+                dialog = null;
+            },
             ':input:first'
         );
     });
@@ -161,7 +171,7 @@ function _showStopRecordingPrompt (recordingType) {
     }
 
     return new Promise(function (resolve, reject) {
-        APP.UI.messageHandler.openTwoButtonDialog(
+        dialog = APP.UI.messageHandler.openTwoButtonDialog(
             title,
             null,
             message,
@@ -174,6 +184,10 @@ function _showStopRecordingPrompt (recordingType) {
                 } else {
                     reject();
                 }
+            },
+            null,
+            function () {
+                dialog = null;
             }
         );
     });
@@ -279,11 +293,15 @@ var Recording = {
 
         var self = this;
         selector.click(function () {
+            if (dialog)
+                return;
+
             switch (self.currentState) {
                 case Status.ON:
                 case Status.PENDING: {
                     _showStopRecordingPrompt(recordingType).then(() =>
-                        self.eventEmitter.emit(UIEvents.RECORDING_TOGGLED));
+                        self.eventEmitter.emit(UIEvents.RECORDING_TOGGLED),
+                        () => {});
                     break;
                 }
                 case Status.AVAILABLE:
@@ -318,16 +336,24 @@ var Recording = {
                     break;
                 }
                 case Status.BUSY: {
-                    APP.UI.messageHandler.openMessageDialog(
+                    dialog = APP.UI.messageHandler.openMessageDialog(
                         self.recordingTitle,
-                        self.recordingBusy
+                        self.recordingBusy,
+                        null, null,
+                        function () {
+                            dialog = null;
+                        }
                     );
                     break;
                 }
                 default: {
-                    APP.UI.messageHandler.openMessageDialog(
+                    dialog = APP.UI.messageHandler.openMessageDialog(
                         self.recordingTitle,
-                        self.recordingUnavailable
+                        self.recordingUnavailable,
+                        null, null,
+                        function () {
+                            dialog = null;
+                        }
                     );
                 }
             }
diff --git a/modules/UI/shared_video/SharedVideo.js b/modules/UI/shared_video/SharedVideo.js
index 827334718..562e9d981 100644
--- a/modules/UI/shared_video/SharedVideo.js
+++ b/modules/UI/shared_video/SharedVideo.js
@@ -17,6 +17,13 @@ export const SHARED_VIDEO_CONTAINER_TYPE = "sharedvideo";
  */
 const defaultSharedVideoLink = "https://www.youtube.com/watch?v=xNXN7CZk8X0";
 const updateInterval = 5000; // milliseconds
+
+/**
+ * The dialog for user input (video link).
+ * @type {null}
+ */
+let dialog = null;
+
 /**
  * Manager of shared video.
  */
@@ -56,11 +63,14 @@ export default class SharedVideoManager {
      * asks whether the user wants to stop sharing the video.
      */
     toggleSharedVideo () {
+        if (dialog)
+            return;
+
         if(!this.isSharedVideoShown) {
             requestVideoLink().then(
                     url => this.emitter.emit(
                                 UIEvents.UPDATE_SHARED_VIDEO, url, 'start'),
-                    err => console.error('SHARED VIDEO CANCELED', err)
+                    err => console.log('SHARED VIDEO CANCELED', err)
             );
             return;
         }
@@ -68,11 +78,16 @@ export default class SharedVideoManager {
         if(APP.conference.isLocalId(this.from)) {
             showStopVideoPropmpt().then(() =>
                 this.emitter.emit(
-                    UIEvents.UPDATE_SHARED_VIDEO, this.url, 'stop'));
+                    UIEvents.UPDATE_SHARED_VIDEO, this.url, 'stop'),
+                () => {});
         } else {
-            APP.UI.messageHandler.openMessageDialog(
+            dialog = APP.UI.messageHandler.openMessageDialog(
                 "dialog.shareVideoTitle",
-                "dialog.alreadySharedVideoMsg"
+                "dialog.alreadySharedVideoMsg",
+                null, null,
+                function () {
+                    dialog = null;
+                }
             );
         }
     }
@@ -700,7 +715,7 @@ function getYoutubeLink(url) {
  */
 function showStopVideoPropmpt() {
     return new Promise(function (resolve, reject) {
-        APP.UI.messageHandler.openTwoButtonDialog(
+        dialog = APP.UI.messageHandler.openTwoButtonDialog(
             "dialog.removeSharedVideoTitle",
             null,
             "dialog.removeSharedVideoMsg",
@@ -713,6 +728,10 @@ function showStopVideoPropmpt() {
                 } else {
                     reject();
                 }
+            },
+            null,
+            function () {
+                dialog = null;
             }
         );
 
@@ -735,7 +754,7 @@ function requestVideoLink() {
     const defaultUrl = i18n.translateString("defaultLink", i18nOptions);
 
     return new Promise(function (resolve, reject) {
-        let dialog = APP.UI.messageHandler.openDialogWithStates({
+        dialog = APP.UI.messageHandler.openDialogWithStates({
             state0: {
                 html:  `
                     <h2>${title}</h2>
@@ -795,6 +814,10 @@ function requestVideoLink() {
                     }
                 }
             }
+        }, {
+            close: function () {
+                dialog = null;
+            }
         });
 
     });
diff --git a/modules/UI/util/MessageHandler.js b/modules/UI/util/MessageHandler.js
index 13b55bf81..1c336600e 100644
--- a/modules/UI/util/MessageHandler.js
+++ b/modules/UI/util/MessageHandler.js
@@ -15,6 +15,12 @@ let notificationsEnabled = true;
  */
 let popupEnabled = true;
 
+/**
+ * Currently displayed two button dialog.
+ * @type {null}
+ */
+let twoButtonDialog = null;
+
 var messageHandler = {
     OK: "dialog.OK",
     CANCEL: "dialog.Cancel",
@@ -30,10 +36,14 @@ var messageHandler = {
      * titleKey will be used to get a title via the translation API.
      * @param message the message to show. If a falsy value is provided,
      * messageKey will be used to get a message via the translation API.
+     * @param closeFunction function to be called after
+     * the prompt is closed (optional)
+     * @return the prompt that was created, or null
      */
-    openMessageDialog: function(titleKey, messageKey, title, message) {
+    openMessageDialog: function(titleKey, messageKey, title, message,
+                                closeFunction) {
         if (!popupEnabled)
-            return;
+            return null;
 
         if (!title) {
             title = APP.translation.generateTranslationHTML(titleKey);
@@ -42,9 +52,14 @@ var messageHandler = {
             message = APP.translation.generateTranslationHTML(messageKey);
         }
 
-        $.prompt(message,
-            {title: title, persistent: false}
-        );
+        return $.prompt(message, {
+            title: title,
+            persistent: false,
+            close: function (e, v, m, f) {
+                if(closeFunction)
+                    closeFunction(e, v, m, f);
+            }
+        });
     },
     /**
      * Shows a message to the user with two buttons: first is given as a
@@ -63,13 +78,14 @@ var messageHandler = {
      *        the dialog is opened
      * @param defaultButton index of default button which will be activated when
      *        the user press 'enter'. Indexed from 0.
+     * @return the prompt that was created, or null
      */
     openTwoButtonDialog: function(titleKey, titleString, msgKey, msgString,
         persistent, leftButtonKey, submitFunction, loadedFunction,
         closeFunction, focus, defaultButton) {
 
-        if (!popupEnabled)
-            return;
+        if (!popupEnabled || twoButtonDialog)
+            return null;
 
         var buttons = [];
 
@@ -87,16 +103,25 @@ var messageHandler = {
         if (msgKey) {
             message = APP.translation.generateTranslationHTML(msgKey);
         }
-        $.prompt(message, {
+        twoButtonDialog = $.prompt(message, {
             title: title,
             persistent: false,
             buttons: buttons,
             defaultButton: defaultButton,
             focus: focus,
             loaded: loadedFunction,
-            submit: submitFunction,
-            close: closeFunction
+            submit: function (e, v, m, f) {
+                twoButtonDialog = null;
+                if (submitFunction)
+                    submitFunction(e, v, m, f);
+            },
+            close: function (e, v, m, f) {
+                twoButtonDialog = null;
+                if (closeFunction)
+                    closeFunction(e, v, m, f);
+            }
         });
+        return twoButtonDialog;
     },
 
     /**
@@ -133,7 +158,7 @@ var messageHandler = {
         if (persistent) {
             args.closeText = '';
         }
-        
+
         return new Impromptu(msgString, args);
     },