diff --git a/backend/open_webui/socket/main.py b/backend/open_webui/socket/main.py
index 8ffdeeadb3..bf6f1deb33 100644
--- a/backend/open_webui/socket/main.py
+++ b/backend/open_webui/socket/main.py
@@ -121,6 +121,7 @@ if WEBSOCKET_MANAGER == 'redis':
         redis_url=WEBSOCKET_REDIS_URL,
         redis_sentinels=ws_sentinels,
         redis_cluster=WEBSOCKET_REDIS_CLUSTER,
+        cache_set_signature=True,
     )
 
     SESSION_POOL = RedisDict(
diff --git a/backend/open_webui/socket/utils.py b/backend/open_webui/socket/utils.py
index 00f8424aae..09fa47de15 100644
--- a/backend/open_webui/socket/utils.py
+++ b/backend/open_webui/socket/utils.py
@@ -61,12 +61,16 @@ class RedisLock:
 
 
 class RedisDict:
-    def __init__(self, name, redis_url, redis_sentinels=[], redis_cluster=False):
+    def __init__(
+        self,
+        name,
+        redis_url,
+        redis_sentinels=[],
+        redis_cluster=False,
+        cache_set_signature=False,
+    ):
         self.name = name
-        # Per-process cache of the last payload fingerprint written by set().
-        # Used to skip redundant HSET round-trips when the model list hasn't
-        # changed — the dominant Redis write source on busy multi-pod setups.
-        self._last_signature: str | None = None
+        self._signature_name = f'{name}:signature' if cache_set_signature else None
         self.redis = get_redis_connection(
             redis_url,
             redis_sentinels,
@@ -77,6 +81,8 @@ class RedisDict:
     def __setitem__(self, key, value):
         serialized_value = JSONCodec.dumps(value)
         self.redis.hset(self.name, key, serialized_value)
+        if self._signature_name:
+            self.redis.delete(self._signature_name)
 
     def __getitem__(self, key):
         value = self.redis.hget(self.name, key)
@@ -88,6 +94,8 @@ class RedisDict:
         result = self.redis.hdel(self.name, key)
         if result == 0:
             raise KeyError(key)
+        if self._signature_name:
+            self.redis.delete(self._signature_name)
 
     def __contains__(self, key):
         return self.redis.hexists(self.name, key)
@@ -106,8 +114,7 @@ class RedisDict:
 
     def set(self, mapping: dict):
         if not mapping:
-            self.redis.delete(self.name)
-            self._last_signature = None
+            self.clear()
             return
 
         # Serialize values once — reused for both the fingerprint and the write.
@@ -120,11 +127,7 @@ class RedisDict:
             digest.update(b'\0')
         signature = digest.hexdigest()
 
-        # Skip the write when the prepared mapping is identical to the last one
-        # this process wrote.  The check is per-instance (not distributed), but
-        # still eliminates the majority of redundant writes because each pod
-        # typically produces the same model list on consecutive refreshes.
-        if signature == self._last_signature:
+        if self._signature_name and self.redis.get(self._signature_name) == signature:
             return
 
         # Fetch existing keys before writing so we know which ones to remove.
@@ -140,7 +143,8 @@ class RedisDict:
         if keys_to_remove:
             self.redis.hdel(self.name, *keys_to_remove)
 
-        self._last_signature = signature
+        if self._signature_name:
+            self.redis.set(self._signature_name, signature)
 
     def get(self, key, default=None):
         try:
@@ -149,8 +153,11 @@ class RedisDict:
             return default
 
     def clear(self):
-        self.redis.delete(self.name)
-        self._last_signature = None
+        if self._signature_name:
+            self.redis.delete(self.name)
+            self.redis.delete(self._signature_name)
+        else:
+            self.redis.delete(self.name)
 
     def update(self, other=None, **kwargs):
         if other is not None: