diff --git a/extensions/telegram/src/bot-message-dispatch.fallback-topic-media.test.ts b/extensions/telegram/src/bot-message-dispatch.fallback-topic-media.test.ts
index 98261e182ee2..5d29e30adc90 100644
--- a/extensions/telegram/src/bot-message-dispatch.fallback-topic-media.test.ts
+++ b/extensions/telegram/src/bot-message-dispatch.fallback-topic-media.test.ts
@@ -1,3 +1,7 @@
+import {
+  createOutboundPayloadPlan,
+  projectOutboundPayloadPlanForDelivery,
+} from "openclaw/plugin-sdk/channel-outbound";
 import { describe, expect, it, vi } from "vitest";
 import {
   describeTelegramDispatch,
@@ -296,6 +300,45 @@ describeTelegramDispatch("dispatchTelegramMessage fallback-topic-media", () => {
       expect(finalDeliveryPayload().mediaUrls).toEqual([]);
     });
 
+    it("does not restore block-sent legacy media when the final includes another attachment", async () => {
+      const sentMediaUrl = "/tmp/cat.jpg";
+      const remainingMediaUrl = "/tmp/dog.jpg";
+      deliverReplies.mockResolvedValue({ delivered: true });
+      deliverInboundReplyWithMessageSendContext.mockResolvedValue({
+        status: "handled_visible",
+        delivery: { messageIds: ["101"], visibleReplySent: true },
+      });
+      dispatchReplyWithBufferedBlockDispatcher.mockImplementation(async ({ dispatcherOptions }) => {
+        await dispatcherOptions.deliver({ mediaUrl: sentMediaUrl }, { kind: "block" });
+        await dispatcherOptions.deliver(
+          {
+            text: "Here are the images",
+            mediaUrls: [remainingMediaUrl],
+            mediaUrl: sentMediaUrl,
+          },
+          { kind: "final" },
+        );
+        return { queuedFinal: true };
+      });
+
+      await dispatchWithContext({
+        context: createContext(),
+        streamMode: "off",
+        telegramDeps: telegramDepsForTest,
+      });
+
+      const finalPayload = finalDeliveryPayload();
+      expect(finalPayload).toMatchObject({
+        text: "Here are the images",
+        mediaUrl: undefined,
+        mediaUrls: [remainingMediaUrl],
+      });
+      expect(
+        projectOutboundPayloadPlanForDelivery(createOutboundPayloadPlan([finalPayload]))[0]
+          ?.mediaUrls,
+      ).toEqual([remainingMediaUrl]);
+    });
+
     it("preserves final media when block delivery reports no visible send", async () => {
       deliverReplies.mockResolvedValueOnce({ delivered: false });
       deliverReplies.mockResolvedValue({ delivered: true });
diff --git a/extensions/telegram/src/bot-message-dispatch.media-dedup.test.ts b/extensions/telegram/src/bot-message-dispatch.media-dedup.test.ts
index afd6d527cddd..322ad0e1bc0c 100644
--- a/extensions/telegram/src/bot-message-dispatch.media-dedup.test.ts
+++ b/extensions/telegram/src/bot-message-dispatch.media-dedup.test.ts
@@ -55,7 +55,7 @@ describe("deduplicateBlockSentMedia", () => {
     expect(result).toEqual({ text: "captioned", mediaUrl: undefined, mediaUrls: [] });
   });
 
-  it("preserves legacy mediaUrl when some mediaUrls remain", () => {
+  it("clears already-sent legacy mediaUrl when other mediaUrls remain", () => {
     const payload = {
       text: "hey",
       mediaUrl: "/tmp/a.jpg",
@@ -63,6 +63,42 @@ describe("deduplicateBlockSentMedia", () => {
     };
     const sent = new Set(["/tmp/a.jpg"]);
     const result = deduplicateBlockSentMedia(payload, sent);
-    expect(result).toEqual({ text: "hey", mediaUrl: "/tmp/a.jpg", mediaUrls: ["/tmp/b.jpg"] });
+    expect(result).toEqual({ text: "hey", mediaUrl: undefined, mediaUrls: ["/tmp/b.jpg"] });
+  });
+
+  it("preserves legacy mediaUrl when its attachment remains unsent", () => {
+    const payload = {
+      text: "hey",
+      mediaUrl: "/tmp/b.jpg",
+      mediaUrls: ["/tmp/a.jpg", "/tmp/b.jpg"],
+    };
+    const sent = new Set(["/tmp/a.jpg"]);
+    const result = deduplicateBlockSentMedia(payload, sent);
+    expect(result).toEqual({ text: "hey", mediaUrl: "/tmp/b.jpg", mediaUrls: ["/tmp/b.jpg"] });
+  });
+
+  it.each(["/tmp/dog.jpg", " /tmp/dog.jpg "])(
+    "preserves unsent legacy mediaUrl outside the remaining mediaUrls (%s)",
+    (mediaUrl) => {
+      const payload = {
+        text: "hey",
+        mediaUrl,
+        mediaUrls: ["/tmp/cat.jpg", "/tmp/bird.jpg"],
+      };
+      const sent = new Set(["/tmp/cat.jpg"]);
+      const result = deduplicateBlockSentMedia(payload, sent);
+      expect(result).toEqual({ text: "hey", mediaUrl, mediaUrls: ["/tmp/bird.jpg"] });
+    },
+  );
+
+  it("clears whitespace-padded legacy mediaUrl after its normalized attachment was sent", () => {
+    const payload = {
+      text: "hey",
+      mediaUrl: " /tmp/a.jpg ",
+      mediaUrls: ["/tmp/a.jpg", "/tmp/b.jpg"],
+    };
+    const sent = new Set(["/tmp/a.jpg"]);
+    const result = deduplicateBlockSentMedia(payload, sent);
+    expect(result).toEqual({ text: "hey", mediaUrl: undefined, mediaUrls: ["/tmp/b.jpg"] });
   });
 });
diff --git a/extensions/telegram/src/bot-message-dispatch.media-dedup.ts b/extensions/telegram/src/bot-message-dispatch.media-dedup.ts
index 71bbdbe67a62..a4809c813c6a 100644
--- a/extensions/telegram/src/bot-message-dispatch.media-dedup.ts
+++ b/extensions/telegram/src/bot-message-dispatch.media-dedup.ts
@@ -1,4 +1,4 @@
-// Telegram plugin module implements bot message dispatch.media dedup behavior.
+// Keep sent-block media out of both delivery fields so outbound planning cannot restore it.
 export function deduplicateBlockSentMedia<
   T extends { mediaUrl?: string; mediaUrls?: string[]; text?: string },
 >(payload: T, sentBlockMediaUrls: ReadonlySet<string>): T | undefined {
@@ -15,6 +15,6 @@ export function deduplicateBlockSentMedia<
   return {
     ...payload,
     mediaUrls: remainingMedia,
-    mediaUrl: remainingMedia.length === 0 ? undefined : payload.mediaUrl,
+    mediaUrl: sentBlockMediaUrls.has(payload.mediaUrl?.trim() ?? "") ? undefined : payload.mediaUrl,
   };
 }