diff --git a/extensions/qa-channel/src/inbound.test.ts b/extensions/qa-channel/src/inbound.test.ts
index 200e5edc8da6..429e2c783f08 100644
--- a/extensions/qa-channel/src/inbound.test.ts
+++ b/extensions/qa-channel/src/inbound.test.ts
@@ -118,6 +118,26 @@ describe("handleQaInbound", () => {
     );
   });
 
+  it("treats deliveries without dispatcher metadata as final replies", async () => {
+    const runtime = createPluginRuntimeMock();
+    setQaChannelRuntime(runtime);
+
+    await handleQaInbound(createQaInboundParams());
+
+    const assembled = firstRunAssembledParams(runtime);
+    await assembled.replyOptions?.onPartialReply?.({ text: "preview" });
+    const deliverWithoutInfo = assembled.delivery.deliver as (payload: {
+      text: string;
+    }) => Promise<unknown>;
+    await deliverWithoutInfo({ text: "final answer" });
+
+    expect(sendQaBusMessage).toHaveBeenCalledOnce();
+    expect(editQaBusMessage).toHaveBeenCalledWith(
+      expect.objectContaining({ messageId: "preview-1", text: "final answer" }),
+    );
+    expect(deleteQaBusMessage).not.toHaveBeenCalled();
+  });
+
   it("keeps block deliveries separate and retains tool calls discovered after a preview", async () => {
     const runtime = createPluginRuntimeMock();
     setQaChannelRuntime(runtime);
diff --git a/extensions/qa-channel/src/inbound.ts b/extensions/qa-channel/src/inbound.ts
index 2dcb0dcdb680..4d4a0c593e8d 100644
--- a/extensions/qa-channel/src/inbound.ts
+++ b/extensions/qa-channel/src/inbound.ts
@@ -372,7 +372,7 @@ export async function handleQaInbound(params: {
         if (!text.trim()) {
           return;
         }
-        await preview.deliver(text, info.kind);
+        await preview.deliver(text, info?.kind ?? "final");
       },
       onError: (error) => {
         void preview.clear().catch((clearError: unknown) => {