diff --git a/scripts/openclaw-cross-os-release-checks.ts b/scripts/openclaw-cross-os-release-checks.ts
index 23902047d377..fc8065232ad7 100644
--- a/scripts/openclaw-cross-os-release-checks.ts
+++ b/scripts/openclaw-cross-os-release-checks.ts
@@ -2741,16 +2741,21 @@ async function postDiscordMessage(params) {
   }
 }
 
-async function deleteDiscordMessage(params) {
+export async function deleteDiscordMessage(params) {
   if (!params.messageId) {
     return;
   }
-  await fetch(
-    `https://discord.com/api/v10/channels/${params.channelId}/messages/${params.messageId}`,
-    buildDiscordFetchInit(params.token, {
-      method: "DELETE",
-    }),
-  ).catch(() => undefined);
+  try {
+    const response = await fetch(
+      `https://discord.com/api/v10/channels/${params.channelId}/messages/${params.messageId}`,
+      buildDiscordFetchInit(params.token, {
+        method: "DELETE",
+      }),
+    );
+    await response.body?.cancel?.().catch(() => undefined);
+  } catch {
+    // Cleanup is best-effort; the smoke result should not fail after readback succeeds.
+  }
 }
 
 async function waitForInstalledDiscordReadback(params) {
diff --git a/test/scripts/openclaw-cross-os-release-checks.test.ts b/test/scripts/openclaw-cross-os-release-checks.test.ts
index f66486627de3..6815236fce43 100644
--- a/test/scripts/openclaw-cross-os-release-checks.test.ts
+++ b/test/scripts/openclaw-cross-os-release-checks.test.ts
@@ -50,6 +50,7 @@ import {
   CROSS_OS_DISCORD_FETCH_TIMEOUT_MS,
   CROSS_OS_AGENT_TURN_TIMEOUT_SECONDS,
   CROSS_OS_COMMAND_HEARTBEAT_SECONDS,
+  deleteDiscordMessage,
   isImmutableReleaseRef,
   isRecoverableWindowsPackagedUpgradeSwapCleanupFailure,
   isRecoverableWindowsPackagedUpgradeTimeoutError,
@@ -1470,6 +1471,31 @@ describe("scripts/openclaw-cross-os-release-checks", () => {
     expect(init.signal).toBeInstanceOf(AbortSignal);
   });
 
+  it("cancels Discord delete response bodies", async () => {
+    let canceled = false;
+    const originalFetch = globalThis.fetch;
+    globalThis.fetch = (async () =>
+      new Response(
+        new ReadableStream<Uint8Array>({
+          cancel() {
+            canceled = true;
+          },
+        }),
+        { status: 200 },
+      )) as typeof fetch;
+    try {
+      await deleteDiscordMessage({
+        channelId: "channel-123",
+        messageId: "message-456",
+        token: "discord-token",
+      });
+    } finally {
+      globalThis.fetch = originalFetch;
+    }
+
+    expect(canceled).toBe(true);
+  });
+
   it("keeps the dev-update lane for main only", () => {
     expect(shouldRunMainChannelDevUpdate("main")).toBe(true);
     expect(shouldRunMainChannelDevUpdate("08753a1d793c040b101c8a26c43445dbbab14995")).toBe(false);