diff --git a/backend/open_webui/socket/utils.py b/backend/open_webui/socket/utils.py
index 682d779ccd..16b0cc3855 100644
--- a/backend/open_webui/socket/utils.py
+++ b/backend/open_webui/socket/utils.py
@@ -82,13 +82,22 @@ class RedisDict:
         return [(k, json.loads(v)) for k, v in self.redis.hgetall(self.name).items()]
 
     def set(self, mapping: dict):
-        pipe = self.redis.pipeline()
+        if not mapping:
+            self.redis.delete(self.name)
+            return
 
-        pipe.delete(self.name)
-        if mapping:
-            pipe.hset(self.name, mapping={k: json.dumps(v) for k, v in mapping.items()})
+        # Fetch existing keys before writing so we know which ones to remove.
+        # HKEYS is cheap — it transfers only short key strings, not large JSON values.
+        existing_keys = set(self.redis.hkeys(self.name))
+        new_keys = set(mapping.keys())
+        keys_to_remove = existing_keys - new_keys
 
-        pipe.execute()
+        # HSET first (add/update all new values), then HDEL (remove stale keys).
+        # We never DELETE the whole hash — this eliminates the race window
+        # where concurrent readers would see an empty models dict.
+        self.redis.hset(self.name, mapping={k: json.dumps(v) for k, v in mapping.items()})
+        if keys_to_remove:
+            self.redis.hdel(self.name, *keys_to_remove)
 
     def get(self, key, default=None):
         try:
diff --git a/src/lib/components/layout/Sidebar/UserMenu.svelte b/src/lib/components/layout/Sidebar/UserMenu.svelte
index cc250e5458..293c3a4f3d 100644
--- a/src/lib/components/layout/Sidebar/UserMenu.svelte
+++ b/src/lib/components/layout/Sidebar/UserMenu.svelte
@@ -237,49 +237,49 @@
 
 			{#if role === 'admin'}
 				<a
-				href="/playground"
-				draggable="false"
-				class="flex rounded-xl py-1.5 px-3 w-full hover:bg-gray-50 dark:hover:bg-gray-800 transition cursor-pointer select-none"
-				on:click={async (e) => {
-					if (e.metaKey || e.ctrlKey || e.shiftKey || e.button === 1) {
-						return;
-					}
-					e.preventDefault();
-					show = false;
-					goto('/playground');
-					if ($mobile) {
-						await tick();
-						showSidebar.set(false);
-					}
-				}}
-			>
-				<div class=" self-center mr-3">
-					<Code className="size-5" strokeWidth="1.5" />
-				</div>
-				<div class=" self-center truncate">{$i18n.t('Playground')}</div>
-			</a>
-			<a
-				href="/admin"
-				draggable="false"
-				class="flex rounded-xl py-1.5 px-3 w-full hover:bg-gray-50 dark:hover:bg-gray-800 transition cursor-pointer select-none"
-				on:click={async (e) => {
-					if (e.metaKey || e.ctrlKey || e.shiftKey || e.button === 1) {
-						return;
-					}
-					e.preventDefault();
-					show = false;
-					goto('/admin');
-					if ($mobile) {
-						await tick();
-						showSidebar.set(false);
-					}
-				}}
-			>
-				<div class=" self-center mr-3">
-					<UserGroup className="w-5 h-5" strokeWidth="1.5" />
-				</div>
-				<div class=" self-center truncate">{$i18n.t('Admin Panel')}</div>
-			</a>
+					href="/playground"
+					draggable="false"
+					class="flex rounded-xl py-1.5 px-3 w-full hover:bg-gray-50 dark:hover:bg-gray-800 transition cursor-pointer select-none"
+					on:click={async (e) => {
+						if (e.metaKey || e.ctrlKey || e.shiftKey || e.button === 1) {
+							return;
+						}
+						e.preventDefault();
+						show = false;
+						goto('/playground');
+						if ($mobile) {
+							await tick();
+							showSidebar.set(false);
+						}
+					}}
+				>
+					<div class=" self-center mr-3">
+						<Code className="size-5" strokeWidth="1.5" />
+					</div>
+					<div class=" self-center truncate">{$i18n.t('Playground')}</div>
+				</a>
+				<a
+					href="/admin"
+					draggable="false"
+					class="flex rounded-xl py-1.5 px-3 w-full hover:bg-gray-50 dark:hover:bg-gray-800 transition cursor-pointer select-none"
+					on:click={async (e) => {
+						if (e.metaKey || e.ctrlKey || e.shiftKey || e.button === 1) {
+							return;
+						}
+						e.preventDefault();
+						show = false;
+						goto('/admin');
+						if ($mobile) {
+							await tick();
+							showSidebar.set(false);
+						}
+					}}
+				>
+					<div class=" self-center mr-3">
+						<UserGroup className="w-5 h-5" strokeWidth="1.5" />
+					</div>
+					<div class=" self-center truncate">{$i18n.t('Admin Panel')}</div>
+				</a>
 			{/if}
 
 			{#if help}