diff --git a/jam-ui/src/components/client/JKSessionScreen.js b/jam-ui/src/components/client/JKSessionScreen.js
index 8db00b0cd..a1d53294a 100644
--- a/jam-ui/src/components/client/JKSessionScreen.js
+++ b/jam-ui/src/components/client/JKSessionScreen.js
@@ -190,16 +190,6 @@ const JKSessionScreen = () => {
   const backingTrackData = useSelector(selectBackingTrackData);
   const showBackingTrackPlayer = Boolean(backingTrackData);
 
-  // Debug backing track display
-  useEffect(() => {
-    console.log('[SESSION_SCREEN] Backing track display check:', {
-      showBackingTrackPlayer,
-      backingTrackData,
-      'mixerHelper.backingTracks': mixerHelper.backingTracks,
-      'mixerHelper.backingTracks?.length': mixerHelper.backingTracks?.length
-    });
-  }, [showBackingTrackPlayer, backingTrackData, mixerHelper.backingTracks]);
-
   // Stable callback for backing track popup close
   const handleBackingTrackClose = useCallback(() => {
     console.log('JKSessionScreen: Backing Track Popup closing');
diff --git a/jam-ui/src/hooks/useSessionWebSocket.js b/jam-ui/src/hooks/useSessionWebSocket.js
index 34fe9daf8..a79bba88b 100644
--- a/jam-ui/src/hooks/useSessionWebSocket.js
+++ b/jam-ui/src/hooks/useSessionWebSocket.js
@@ -119,15 +119,14 @@ export const useSessionWebSocket = (sessionId) => {
       },
 
       // Phase 5: Mixer and Media events
+      // NOTE: MIXER_CHANGES message type not currently sent by server
+      // Media arrays (backingTracks, jamTracks, recordedTracks) are now extracted
+      // from session REST API response in useSessionModel.js
       MIXER_CHANGES: (sessionMixers) => {
-        console.log('[MIXER_CHANGES] Received:', sessionMixers);
+        console.log('[MIXER_CHANGES] Received (legacy handler):', sessionMixers);
         const session = sessionMixers.session;
         const mixers = sessionMixers.mixers;
 
-        console.log('[MIXER_CHANGES] Backing tracks in payload:', mixers.backingTracks);
-        console.log('[MIXER_CHANGES] Jam tracks in payload:', mixers.jamTracks);
-        console.log('[MIXER_CHANGES] Recorded tracks in payload:', mixers.recordedTracks);
-
         // Update media summary
         if (mixers.mediaSummary) {
           dispatch(updateMediaSummary(mixers.mediaSummary));