diff --git a/src/stores/auth/auth-context.tsx b/src/stores/auth/auth-context.tsx
index a255ea67..abf038ce 100644
--- a/src/stores/auth/auth-context.tsx
+++ b/src/stores/auth/auth-context.tsx
@@ -61,11 +61,14 @@ export function AuthProvider({ children }: AuthProviderProps) {
       password: state.context.password,
       username: state.context.username,
       confirmPassword: state.context.confirmPassword,
-      // isLoading 覆盖邮箱登录 / 邮箱注册 / OAuth 跳转（NextAuth 重定向期间）/ 显式游客登录
+      // isLoading 覆盖邮箱登录 / 邮箱注册 / OAuth 跳转（NextAuth 重定向期间）/
+      // OAuth 回调后端 sync / 显式游客登录
       isLoading:
         state.matches("loadingEmailLogin") ||
         state.matches("loadingEmailRegister") ||
         state.matches("loadingOAuth") ||
+        state.matches("syncingGoogleBackend") ||
+        state.matches("syncingFacebookBackend") ||
         state.matches("loadingGuestLogin"),
       errorMessage: state.context.errorMessage,
       loginStatus: state.context.loginStatus,