diff --git a/web/js/MonitorStream.js b/web/js/MonitorStream.js
index c82ce6e1e..fe635d804 100644
--- a/web/js/MonitorStream.js
+++ b/web/js/MonitorStream.js
@@ -1784,7 +1784,12 @@ function MonitorStream(monitorData) {
         stream.mode = this.player.substring(this.player.indexOf('_')+1);
       }
       const video_el = this.getAVStream();
-      if (video_el) video_el.muted = this.muted;
+      if (video_el) {
+        video_el.muted = this.muted;
+      } else {
+        console.warn(`go2rtc DOM element of video stream for monitor with ID=${this.id} not found`);
+        return;
+      }
       this.handlerEventListenerStream(video_el);
 
       clearInterval(this.statusCmdTimer); // Fix for issues in Chromium when quickly hiding/showing a page. Doesn't clear statusCmdTimer when minimizing a page https://stackoverflow.com/questions/9501813/clearinterval-not-working
@@ -1813,7 +1818,12 @@ function MonitorStream(monitorData) {
 
       const rtsp2webModUrl = url;
       const video_el = this.getAVStream();
-      if (video_el) video_el.muted = this.muted;
+      if (video_el) {
+        video_el.muted = this.muted;
+      } else {
+        console.warn(`rtsp2web DOM element of video stream for monitor with ID=${this.id} not found`);
+        return;
+      }
       this.handlerEventListenerStream(video_el);
       rtsp2webModUrl.username = '';
       rtsp2webModUrl.password = '';
@@ -1914,7 +1924,12 @@ function MonitorStream(monitorData) {
     stream.setAttribute("autoplay", "");
     stream.setAttribute("muted", this.muted);
     const video_el = this.getAVStream();
-    if (video_el) video_el.muted = this.muted;
+    if (video_el) {
+      video_el.muted = this.muted;
+    } else {
+      console.warn(`janus DOM element of video stream for monitor with ID=${this.id} not found`);
+      return;
+    }
     this.handlerEventListenerStream(video_el);
     if (ZM_JANUS_PATH) {
       server = ZM_JANUS_PATH;
diff --git a/web/js/panzoom.js b/web/js/panzoom.js
index ff3ea5f76..aac4d78e0 100644
--- a/web/js/panzoom.js
+++ b/web/js/panzoom.js
@@ -261,7 +261,13 @@ var zmPanZoom = {
       if (videoJs) videoJs.style.pointerEvents = 'none';
     } else {
       this.panZoom[id].setOptions({handleStartEvent: (event) => {}});
-      if (videoJs) videoJs.style.pointerEvents = '';
+      if (videoJs) {
+        if (this.shifted || this.ctrled || this.alted) {
+          videoJs.style.pointerEvents = 'none';
+        } else {
+          videoJs.style.pointerEvents = '';
+        }
+      }
     }
   },