diff --git a/lib/app.dart b/lib/app.dart
index ca77a3d..befc569 100644
--- a/lib/app.dart
+++ b/lib/app.dart
@@ -334,7 +334,18 @@ class _PaginaPrincipalState extends State<_PaginaPrincipal> {
       debugPrint(
         '[PluriWave][alarmas] alarma ignorada porque ya hay una activa id=${alarma.id} activa=$_alarmaSonandoId',
       );
-      await alarmas.android.ocultarNotificacionAlarma(alarma.id);
+      // A duplicate delivery of the SAME ring's own fire event (the live
+      // eventosAlarma stream and the one-shot obtenerEventoInicial() read
+      // the same native event and can both reach here) must be a no-op:
+      // ocultarNotificacionAlarma -> dismissAlarmNotification unconditionally
+      // stops PluriWaveAlarmService for that id on the native side, which
+      // would tear down the currently-ringing service and undo the
+      // ring-scoped media-volume override long before the real handoff.
+      // Only hide the notification when a genuinely DIFFERENT alarm fired
+      // while this one is active (single-ring-at-a-time by design).
+      if (alarma.id != _alarmaSonandoId) {
+        await alarmas.android.ocultarNotificacionAlarma(alarma.id);
+      }
       return;
     }