chore: construct requests with duplex option

.changeset/use-fetch-duplex.md

@@ -0,0 +1,5 @@
+---
+"@remix-run/server-runtime": patch
+---
+
+construct request with duplex option

packages/remix-server-runtime/data.ts

@@ -113,11 +113,33 @@ function stripIndexParam(request: Request) {
     url.searchParams.append("index", toKeep);
   }
 
-  return new Request(url.href, request);
+  let init: RequestInit = {
+    method: request.method,
+    body: request.body,
+    headers: request.headers,
+    signal: request.signal,
+  };
+
+  if (init.body) {
+    (init as { duplex: "half" }).duplex = "half";
+  }
+
+  return new Request(url.href, init);
 }
 
 function stripDataParam(request: Request) {
   let url = new URL(request.url);
   url.searchParams.delete("_data");
-  return new Request(url.href, request);
+  let init: RequestInit = {
+    method: request.method,
+    body: request.body,
+    headers: request.headers,
+    signal: request.signal,
+  };
+
+  if (init.body) {
+    (init as { duplex: "half" }).duplex = "half";
+  }
+
+  return new Request(url.href, init);
 }