diff --git a/packages/runtime/plugin-runtime/src/router/runtime/DeferredDataScripts.node.tsx b/packages/runtime/plugin-runtime/src/router/runtime/DeferredDataScripts.node.tsx
index 179d8203379..8564fe1b8ee 100644
--- a/packages/runtime/plugin-runtime/src/router/runtime/DeferredDataScripts.node.tsx
+++ b/packages/runtime/plugin-runtime/src/router/runtime/DeferredDataScripts.node.tsx
@@ -63,6 +63,7 @@ const DeferredDataScripts = (props?: {
     const initialScript0 = useJsonScript
       ? `${serializeJson(_ROUTER_DATA)}`
       : '';
+    // When useJsonScript, script `modernInline` may not be used, and it will be replaced with an external link script internally
     const initialScript1 = useJsonScript
       ? modernInline
       : [`_ROUTER_DATA = ${serializeJson(_ROUTER_DATA)};`, modernInline].join(
@@ -165,15 +166,15 @@ const DeferredDataScripts = (props?: {
             />
           )}
           <script
-            async
             nonce={props?.nonce}
+            defer
             data-script-src="modern-inline"
             suppressHydrationWarning
             dangerouslySetInnerHTML={{ __html: deferredScripts[1] }}
           />
           {deferredScripts[2].map(({ fnName, fnArgs, fnRun, fnScriptSrc }) => (
             <script
-              async
+              defer
               key={fnName}
               data-script-src={fnScriptSrc}
               data-fn-name={fnName}