diff --git a/pmoapp/webapp/src/composables/useRenderers.ts b/pmoapp/webapp/src/composables/useRenderers.ts
index b653bee7..703abbd0 100644
--- a/pmoapp/webapp/src/composables/useRenderers.ts
+++ b/pmoapp/webapp/src/composables/useRenderers.ts
@@ -183,6 +183,8 @@ function ensureSSEConnected() {
         snapshot.state.current_track.artist = event.artist;
         snapshot.state.current_track.album = event.album;
         snapshot.state.current_track.album_art_uri = event.album_art_uri;
+        // Important: Trigger reactivity en réassignant l'objet complet
+        snapshotState.snapshots.set(rendererId, { ...snapshot });
         break;
 
       case "queue_updated":
diff --git a/pmocontrol/src/music_renderer/musicrenderer.rs b/pmocontrol/src/music_renderer/musicrenderer.rs
index 9baf701b..49389282 100644
--- a/pmocontrol/src/music_renderer/musicrenderer.rs
+++ b/pmocontrol/src/music_renderer/musicrenderer.rs
@@ -463,7 +463,18 @@ impl MusicRenderer {
             let changed = watched
                 .position
                 .as_ref()
-                .map(|prev| !playback_position_equal(prev, &position))
+                .map(|prev| {
+                    let equal = playback_position_equal(prev, &position);
+                    if !equal {
+                        tracing::trace!(
+                            "MusicRenderer [{}]: Position changed - prev_rel_time={:?}, new_rel_time={:?}",
+                            self.info.friendly_name(),
+                            prev.rel_time,
+                            position.rel_time
+                        );
+                    }
+                    !equal
+                })
                 .unwrap_or(true);
 
             if changed {
@@ -943,27 +954,26 @@ impl MusicRenderer {
             }
         }
 
-        // Calculate rel_time from track_start_time if available (backend values are unreliable)
-        if let Some(start_time) = self.track_start_time() {
-            if let Ok(elapsed) = start_time.elapsed() {
-                let secs = elapsed.as_secs() as u32;
-                let hours = secs / 3600;
-                let minutes = (secs % 3600) / 60;
-                let seconds = secs % 60;
-                let new_rel_time = format!("{:02}:{:02}:{:02}", hours, minutes, seconds);
-                tracing::info!(
-                    "MusicRenderer: Patching rel_time: backend={:?} -> calculated={} (elapsed={}s)",
-                    position_info.rel_time,
-                    new_rel_time,
-                    secs
-                );
-                position_info.rel_time = Some(new_rel_time);
+        // Pour les flux continus uniquement : calculer rel_time depuis track_start_time
+        // Pour les fichiers normaux : garder les valeurs du backend
+        let is_stream = self.is_playing_a_stream();
+        if is_stream {
+            if let Some(start_time) = self.track_start_time() {
+                if let Ok(elapsed) = start_time.elapsed() {
+                    let secs = elapsed.as_secs() as u32;
+                    let hours = secs / 3600;
+                    let minutes = (secs % 3600) / 60;
+                    let seconds = secs % 60;
+                    let new_rel_time = format!("{:02}:{:02}:{:02}", hours, minutes, seconds);
+                    tracing::debug!(
+                        "MusicRenderer [{}]: Stream - calculating rel_time from track_start_time: {} (elapsed={}s)",
+                        self.info.friendly_name(),
+                        new_rel_time,
+                        secs
+                    );
+                    position_info.rel_time = Some(new_rel_time);
+                }
             }
-        } else {
-            tracing::info!(
-                "MusicRenderer: No track_start_time, keeping backend rel_time={:?}",
-                position_info.rel_time
-            );
         }
 
         Ok(position_info)
diff --git a/pmocontrol/src/music_renderer/openhome_renderer.rs b/pmocontrol/src/music_renderer/openhome_renderer.rs
index 4ddf3eac..ff05f0fb 100644
--- a/pmocontrol/src/music_renderer/openhome_renderer.rs
+++ b/pmocontrol/src/music_renderer/openhome_renderer.rs
@@ -369,15 +369,19 @@ impl PlaybackPosition for OpenHomeRenderer {
             Some(format_hhmmss_u32(time_info.duration_secs))
         };
 
+        let rel_time = format_hhmmss_u32(time_info.elapsed_secs);
+
         tracing::trace!(
-            "OpenHome playback_position: duration_secs={}, track_duration={:?}",
+            "OpenHome playback_position: duration_secs={}, track_duration={:?}, elapsed_secs={}, rel_time={}",
             time_info.duration_secs,
-            track_duration
+            track_duration,
+            time_info.elapsed_secs,
+            rel_time
         );
 
         Ok(PlaybackPositionInfo {
             track: track_id,
-            rel_time: Some(format_hhmmss_u32(time_info.elapsed_secs)),
+            rel_time: Some(rel_time),
             abs_time: None,
             track_duration,
             track_metadata: track_metadata_xml,