diff --git a/app.py b/app.py
index 07f65c5..1356c7f 100644
--- a/app.py
+++ b/app.py
@@ -39,12 +39,11 @@ async def lifespan(application: FastAPI):
     interval = int(database.get_setting("poll_interval", "15"))
     bg_scheduler.add_job(scheduler.poll_status, "interval", seconds=interval, id="poll")
     bg_scheduler.add_job(scheduler.check_devices, "interval", seconds=240, id="device_check")
+    # Initial device check nach 5 Sekunden (nicht blockierend)
+    bg_scheduler.add_job(scheduler.check_devices, "date", id="device_check_init")
     bg_scheduler.start()
     logger.info("Polling gestartet (Intervall: %ds)", interval)
 
-    # Initial device check
-    scheduler.check_devices()
-
     yield
 
     bg_scheduler.shutdown()