diff --git a/app/src/main/java/com/example/medilightv2android/ui/components/FirmwareWarningBanner.kt b/app/src/main/java/com/example/medilightv2android/ui/components/FirmwareWarningBanner.kt
index 25d1aa3..2079111 100644
--- a/app/src/main/java/com/example/medilightv2android/ui/components/FirmwareWarningBanner.kt
+++ b/app/src/main/java/com/example/medilightv2android/ui/components/FirmwareWarningBanner.kt
@@ -41,6 +41,10 @@ fun FirmwareWarningBanner(bleManager: BleManager, modifier: Modifier = Modifier)
     val fw by bleManager.firmwareVersion
     val isConnected by bleManager.isConnected
 
+    // 미연결 상태에선 펌웨어 배너 일절 노출 X. dev bypass / demo mode / 이전 세션
+    // 잔여 firmwareVersion 값으로 인한 false positive 방지.
+    if (!isConnected) return
+
     // (2) 연결됐는데 일정 시간 동안 펌웨어 미수신 추적
     var timedOut by remember { mutableStateOf(false) }
     LaunchedEffect(isConnected, fw) {