diff --git a/CHANGELOG.md b/CHANGELOG.md
index 464c81a3852..d2bbfa575c3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -76,6 +76,7 @@ Docs: https://docs.openclaw.ai
 - Gateway/thread routing: preserve Slack, Telegram, and Mattermost thread-child delivery targets so bound subagent completion messages land in the originating thread instead of top-level channels. (#54840) Thanks @yzzymt.
 - ACP/stream relay: pass parent delivery context to ACP stream relay system events so `streamTo="parent"` updates route to the correct thread or topic instead of falling back to the main DM. (#57056) Thanks @pingren.
 - Agents/sessions: preserve announce `threadId` when `sessions.list` fallback rehydrates agent-to-agent announce targets so final announce messages stay in the originating thread/topic. (#63506) Thanks @SnowSky1.
+- iMessage/self-chat: remember ambiguous `sender === chat_identifier` outbound rows with missing `destination_caller_id` in self-chat dedupe state so the later reflected inbound copy still drops instead of re-entering inbound handling when the echo cache misses. Thanks @neeravmakwana.
 
 ## 2026.4.9
 
diff --git a/extensions/imessage/src/monitor/inbound-processing.ts b/extensions/imessage/src/monitor/inbound-processing.ts
index 61794f2d6b3..5d927b6a15c 100644
--- a/extensions/imessage/src/monitor/inbound-processing.ts
+++ b/extensions/imessage/src/monitor/inbound-processing.ts
@@ -217,12 +217,20 @@ export function resolveIMessageInboundDecision(params: {
     chatIdentifierNormalized != null &&
     senderNormalized === chatIdentifierNormalized &&
     matchesSelfChatDestination;
+  const isAmbiguousSelfThread =
+    !isGroup &&
+    chatIdentifierNormalized != null &&
+    senderNormalized === chatIdentifierNormalized &&
+    destinationCallerIdNormalized == null;
   let skipSelfChatHasCheck = false;
   const inboundMessageIds = resolveInboundEchoMessageIds(params.message);
   const inboundMessageId = inboundMessageIds[0];
   const hasInboundGuid = Boolean(normalizeReplyField(params.message.guid));
 
   if (params.message.is_from_me) {
+    if (isAmbiguousSelfThread) {
+      params.selfChatCache?.remember(selfChatLookup);
+    }
     if (isSelfChat) {
       params.selfChatCache?.remember(selfChatLookup);
       const echoScope = buildIMessageEchoScope({
diff --git a/extensions/imessage/src/monitor/self-chat-dedupe.test.ts b/extensions/imessage/src/monitor/self-chat-dedupe.test.ts
index 0c5d1111c39..8311c759419 100644
--- a/extensions/imessage/src/monitor/self-chat-dedupe.test.ts
+++ b/extensions/imessage/src/monitor/self-chat-dedupe.test.ts
@@ -630,7 +630,7 @@ describe("self-chat is_from_me=true handling (Bruce Phase 2 fix)", () => {
     expect(decision).toEqual({ kind: "drop", reason: "from me" });
   });
 
-  it("does not drop reflected inbound when destination_caller_id is absent (#63980)", () => {
+  it("drops reflected inbound when destination_caller_id is absent (#63980)", () => {
     vi.useFakeTimers();
     vi.setSystemTime(new Date("2026-03-24T12:00:00Z"));
 
@@ -674,7 +674,7 @@ describe("self-chat is_from_me=true handling (Bruce Phase 2 fix)", () => {
       }),
     );
 
-    expect(reflection.kind).toBe("dispatch");
+    expect(reflection).toEqual({ kind: "drop", reason: "self-chat echo" });
   });
 
   it("normal DM is_from_me=true is still dropped (regression test)", () => {