diff --git a/AppImage/ProxMenux-1.2.3.AppImage b/AppImage/ProxMenux-1.2.3.AppImage
index c28d79a8..5aaacf21 100755
Binary files a/AppImage/ProxMenux-1.2.3.AppImage and b/AppImage/ProxMenux-1.2.3.AppImage differ
diff --git a/AppImage/ProxMenux-Monitor.AppImage.sha256 b/AppImage/ProxMenux-Monitor.AppImage.sha256
index a5524aa8..ad1abc7d 100644
--- a/AppImage/ProxMenux-Monitor.AppImage.sha256
+++ b/AppImage/ProxMenux-Monitor.AppImage.sha256
@@ -1 +1 @@
-cd07523bc6d5127029d352fcd9488bb90b37c42809d5061cb22aa8a442f036bb  ProxMenux-1.2.3.AppImage
+7b5dd3ff6fe70a190caf00d1ce5198dfe1917af53d01ab4fd1a3908f3204c0ff  ProxMenux-1.2.3.AppImage
diff --git a/AppImage/scripts/flask_notification_routes.py b/AppImage/scripts/flask_notification_routes.py
index cb445d4b..6f1227e9 100644
--- a/AppImage/scripts/flask_notification_routes.py
+++ b/AppImage/scripts/flask_notification_routes.py
@@ -227,6 +227,14 @@ def _is_own_host_ip(value: str) -> bool:
     CGNAT, WireGuard, LAN, IPv6 GUA…). Without this, PVE hits the layer 3
     ``X-ProxMenux-Timestamp`` check — a header PVE cannot inject dynamically —
     and every notification target test returns ``401 missing_timestamp``.
+
+    IMPORTANT: Flask bound to ``*:8008`` (dual-stack) reports IPv4 peers
+    in v4-mapped IPv6 form (``::ffff:192.168.0.55``). psutil reports the
+    same interface as plain IPv4 (``192.168.0.55``). Without unmapping,
+    literal comparison fails and the fix effectively does nothing in
+    production — reproduced end-to-end on 192.168.0.55: passing the raw
+    literal returned True, but ``::ffff:192.168.0.55`` returned False,
+    which is what Flask actually hands us at runtime.
     """
     if _is_loopback_addr(value):
         return True
@@ -234,7 +242,11 @@ def _is_own_host_ip(value: str) -> bool:
         import ipaddress
         import socket
         import psutil
-        client = ipaddress.ip_address(value).compressed
+        addr = ipaddress.ip_address(value)
+        mapped = getattr(addr, 'ipv4_mapped', None)
+        if mapped is not None:
+            addr = mapped
+        client = addr.compressed
         for _iface, addrs in psutil.net_if_addrs().items():
             for a in addrs:
                 if a.family in (socket.AF_INET, socket.AF_INET6):