diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7e4a3ba5318..7c133095d62 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ Docs: https://docs.openclaw.ai
 
 ### Fixes
 
+- QA/Matrix: split the private QA lab runtime into smaller tested modules, add Matrix media contract coverage for image understanding and generated-image delivery, and update the memory-dreaming QA sweep to assert the separate phase-report layout. (#67430) Thanks @gumadeiras.
 - Gateway/tools: anchor trusted local `MEDIA:` tool-result passthrough on the exact raw name of this run's registered built-in tools, and reject client tool definitions whose names normalize-collide with a built-in or with another client tool in the same request (`400 invalid_request_error` on both JSON and SSE paths), so a client-supplied tool named like a built-in can no longer inherit its local-media trust. (#67303)
 - Agents/replay recovery: classify the provider wording `401 input item ID does not belong to this connection` as replay-invalid, so users get the existing `/new` session reset guidance instead of a raw 401-style failure. (#66475) Thanks @dallylee.
 - Gateway/webchat: enforce localRoots containment on webchat audio embedding path [AI-assisted]. (#67298) Thanks @pgondhi987.
diff --git a/extensions/qa-matrix/src/substrate/client.test.ts b/extensions/qa-matrix/src/substrate/client.test.ts
index a61a4067266..142c4caf364 100644
--- a/extensions/qa-matrix/src/substrate/client.test.ts
+++ b/extensions/qa-matrix/src/substrate/client.test.ts
@@ -238,7 +238,9 @@ describe("matrix driver client", () => {
     expect(requests[0]?.url).toBe(
       "http://127.0.0.1:28008/_matrix/media/v3/upload?filename=red-top-blue-bottom.png",
     );
-    expect(Buffer.isBuffer(requests[0]?.body)).toBe(true);
+    expect(requests[0]?.body instanceof Uint8Array || Buffer.isBuffer(requests[0]?.body)).toBe(
+      true,
+    );
     expect(requests[1]?.url).toContain(
       "/_matrix/client/v3/rooms/!room%3Amatrix-qa.test/send/m.room.message/",
     );
diff --git a/extensions/qa-matrix/src/substrate/client.ts b/extensions/qa-matrix/src/substrate/client.ts
index 15fed8640b1..54f1b8c9ad2 100644
--- a/extensions/qa-matrix/src/substrate/client.ts
+++ b/extensions/qa-matrix/src/substrate/client.ts
@@ -270,9 +270,7 @@ async function uploadMatrixQaContent(params: {
       "content-type": params.contentType ?? "application/octet-stream",
       ...(params.accessToken ? { authorization: `Bearer ${params.accessToken}` } : {}),
     },
-    body: new Blob([Uint8Array.from(params.buffer)], {
-      type: params.contentType ?? "application/octet-stream",
-    }),
+    body: new Uint8Array(params.buffer),
     signal: AbortSignal.timeout(20_000),
   });
   const body = (await response.json().catch(() => ({}))) as {