diff --git a/ROADMAP.md b/ROADMAP.md
index 1e85b42..e03ce9f 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -97,4 +97,5 @@
 | v1.8.20 | 2026-05-05 | Fix: Eigenversorgungskarte bei PV offline, Stromtarif-Einstellungen gehen nicht verloren |
 | v1.8.21 | 2026-05-05 | Fix: Finanzen-Tab bleibt nicht bei "Lade..." hängen (fEur/fKwh Scope-Bug) |
 | v1.8.22 | 2026-05-06 | Fix: Stromtarif-Einstellungen bleiben nach Neustart erhalten; Finanzen-Tab Layout |
-| v1.8.23 | 2026-05-06 | Fix: Goodwe Netzbezug-Periode zeigt 0 kWh — integrierter grid_power-Zähler statt e_total_imp-Delta |
+| v1.8.23 | 2026-05-07 | Fix: Goodwe Netzbezug-Periode zeigt 0 kWh — integrierter grid_power-Zähler statt e_total_imp-Delta |
+| v1.8.24 | 2026-05-07 | Fix: WR/Wallbox-Offline-Flapping — erst nach 3 aufeinanderfolgenden Lesefehlern offline schalten |
diff --git a/haos-addon/config.yaml b/haos-addon/config.yaml
index 3d0666a..088f9bc 100644
--- a/haos-addon/config.yaml
+++ b/haos-addon/config.yaml
@@ -1,5 +1,5 @@
 name: ShineBridge
-version: "1.8.23"
+version: "1.8.24"
 slug: shinebridge
 description: Growatt Wechselrichter lokal in Home Assistant — Modbus TCP via ShineLAN-X, MQTT Discovery, Web UI
 url: https://gitea.bitfire.work/retr0/shinebridge
diff --git a/haos-addon/src/main.py b/haos-addon/src/main.py
index 2ff021b..55a2dbc 100644
--- a/haos-addon/src/main.py
+++ b/haos-addon/src/main.py
@@ -314,6 +314,8 @@ def _poll_loop(inv_cfg: Dict[str, Any], stop: threading.Event):
     inv_int_import = hist_data["_int_import"][-1][1] if hist_data.get("_int_import") else 0.0
     inv_int_export = hist_data["_int_export"][-1][1] if hist_data.get("_int_export") else 0.0
     last_grid_ts = time.time()
+    _fail_count = 0          # aufeinanderfolgende Lesefehler; erst ab >= 3 → offline
+    _OFFLINE_THRESHOLD = 3
 
     while not stop.is_set():
         t0 = time.time()
@@ -354,6 +356,7 @@ def _poll_loop(inv_cfg: Dict[str, Any], stop: threading.Event):
         with State.lock:
             d = State.inv_data.setdefault(inv_id, {"poll_count": 0})
             if values is not None:
+                _fail_count = 0
                 d["values"] = values
                 d["last_update"] = time.time()
                 d["modbus_ok"] = True
@@ -369,9 +372,11 @@ def _poll_loop(inv_cfg: Dict[str, Any], stop: threading.Event):
                     _publisher.publish_data(pub_values, prefix)
                     _publisher.publish_status("online", prefix)
             else:
-                d["modbus_ok"] = False
-                if _publisher:
-                    _publisher.publish_status("offline", prefix)
+                _fail_count += 1
+                if _fail_count >= _OFFLINE_THRESHOLD:
+                    d["modbus_ok"] = False
+                    if _publisher:
+                        _publisher.publish_status("offline", prefix)
 
         # Aggregate nach jedem erfolgreichen Poll neu berechnen und publizieren
         if values is not None and _publisher: