diff --git a/ruby/lib/jam_ruby/models/active_music_session.rb b/ruby/lib/jam_ruby/models/active_music_session.rb
index eba8189c6..489cc3e8a 100644
--- a/ruby/lib/jam_ruby/models/active_music_session.rb
+++ b/ruby/lib/jam_ruby/models/active_music_session.rb
@@ -612,6 +612,7 @@ module JamRuby
 
           active_music_session.with_lock do # VRFS-1297
             active_music_session.tick_track_changes
+            Notification.send_tracks_changed(active_music_session)
             # VRFS-3986
             connection = ConnectionManager.new.join_music_session(user, client_id, active_music_session, as_musician, tracks, audio_latency, client_role, parent_client_id, video_sources)
 
diff --git a/web/lib/music_session_manager.rb b/web/lib/music_session_manager.rb
index d59d9cd42..c3bd13a89 100644
--- a/web/lib/music_session_manager.rb
+++ b/web/lib/music_session_manager.rb
@@ -104,6 +104,7 @@ class MusicSessionManager < BaseManager
 
       active_music_session.with_lock do # VRFS-1297
         active_music_session.tick_track_changes
+        Notification.send_tracks_changed(active_music_session)
         connection = ConnectionManager.new.join_music_session(user, client_id, active_music_session, as_musician, tracks, audio_latency)
 
         if connection.errors.any?
@@ -146,6 +147,7 @@ class MusicSessionManager < BaseManager
     active_music_session.with_lock do # VRFS-1297
       ConnectionManager.new.leave_music_session(user, connection, active_music_session) do
         active_music_session.tick_track_changes
+        Notification.send_tracks_changed(active_music_session)
         recording =  active_music_session.stop_recording # stop any ongoing recording, if there is one
         recordingId = recording.id unless recording.nil?
       end