diff --git a/listener/app.py b/listener/app.py
index 0c3cec5a..ba33b643 100644
--- a/listener/app.py
+++ b/listener/app.py
@@ -909,6 +909,10 @@ def manage_vitek_port(config):
     
     logging.info(f"[{port_name}] START VITEK SERVICE (Relaxed Mode)...")
     print(f"[{port_name}] START VITEK SERVICE (Relaxed Mode)...")
+    # Deteksi stuck dalam window waktu tertentu.
+    STUCK_WINDOW_SEC = 120
+    stuck_count = 0
+    stuck_window_start = None
     while True: 
         try:
             with serial.Serial(
@@ -966,6 +970,8 @@ def manage_vitek_port(config):
                                 print(f"[{port_name}] FULL FRAME: {full_frame}")
                                 # 1. KIRIM ACK (WAJIB)
                                 ser.write(b'\x06')
+                                stuck_count = 0
+                                stuck_window_start = None
                                 
                                 # 2. Proses Data
                                 try:
@@ -986,6 +992,8 @@ def manage_vitek_port(config):
                             logging.info(f"[{port_name}] Session End (EOT).")
                             print(f"[{port_name}] Session End (EOT).")
                             ser.reset_input_buffer()
+                            stuck_count = 0
+                            stuck_window_start = None
                         
                         else:
                             pass
@@ -1030,6 +1038,8 @@ def manage_vitek_port(config):
                                             pass
                                     
                                     if handshake_success:
+                                        stuck_count = 0
+                                        stuck_window_start = None
                                         # === KIRIM DATA ORDER ===
                                         logging.info(f"[{port_name}] Handshake OK. Kirim Frames...")
                                         frames = create_vitek_order_message(pending_order)
@@ -1058,6 +1068,8 @@ def manage_vitek_port(config):
                                             print(f"[{port_name}] Order SELESAI Terkirim.")
                                             setattr(pending_order, flag_col, True)
                                             session.commit()
+                                            stuck_count = 0
+                                            stuck_window_start = None
                                         else:
                                             logging.error(f"[{port_name}] Order Gagal (No ACK).")
                                     
@@ -1069,6 +1081,26 @@ def manage_vitek_port(config):
                                         print(f"[{port_name}] Alat Sibuk/Stuck. Kirim Force EOT.")
                                         ser.write(b'\x04') 
                                         time.sleep(2.0)
+                                        now_ts = time.time()
+                                        if not stuck_window_start or (now_ts - stuck_window_start) > STUCK_WINDOW_SEC:
+                                            stuck_window_start = now_ts
+                                            stuck_count = 1
+                                        else:
+                                            stuck_count += 1
+                                        if stuck_count >= 3:
+                                            # Jika sudah stuck berulang dalam window waktu, restart koneksi serial
+                                            logging.critical(
+                                                f"[{port_name}] Stuck berulang ({stuck_count}x/{STUCK_WINDOW_SEC}s). Restart koneksi serial."
+                                            )
+                                            print(
+                                                f"[{port_name}] Stuck berulang ({stuck_count}x/{STUCK_WINDOW_SEC}s). Restart koneksi serial."
+                                            )
+                                            try:
+                                                ser.reset_input_buffer()
+                                                ser.reset_output_buffer()
+                                            except Exception:
+                                                pass
+                                            raise RuntimeError("Vitek stuck berulang, restart port.")
 
                             except Exception as e:
                                 logging.error(f"[{port_name}] Sending Error: {e}")