diff --git a/mobile/src/session/use-mobile-native-chat-controller.ts b/mobile/src/session/use-mobile-native-chat-controller.ts
index 483de427a09..439dab87a6b 100644
--- a/mobile/src/session/use-mobile-native-chat-controller.ts
+++ b/mobile/src/session/use-mobile-native-chat-controller.ts
@@ -144,7 +144,8 @@ export function useMobileNativeChatController(args: {
     tabId: activeSessionTabId,
     sessionId: activeChatSessionId,
     messages: nativeChatSession.messages,
-    launchDraft: activeChatResolution ? (activeSessionTab?.launchDraft ?? null) : null
+    launchDraft: activeChatResolution ? (activeSessionTab?.launchDraft ?? null) : null,
+    transcriptLoading: nativeChatSession.status === 'loading'
   })
 
   const nativeChatStatus = activeChatResolution ? activeSessionTab?.agentStatus : null
diff --git a/mobile/src/session/use-mobile-native-chat-drafts.test.ts b/mobile/src/session/use-mobile-native-chat-drafts.test.ts
index 0e0df467949..5388f39e358 100644
--- a/mobile/src/session/use-mobile-native-chat-drafts.test.ts
+++ b/mobile/src/session/use-mobile-native-chat-drafts.test.ts
@@ -44,12 +44,14 @@ describe('useMobileNativeChatDrafts', () => {
     tabId,
     sessionId = `session-${tabId}`,
     messages = [],
-    launchDraft = null
+    launchDraft = null,
+    transcriptLoading = false
   }: {
     tabId: string
     sessionId?: string | null
     messages?: NativeChatMessage[]
     launchDraft?: string | null
+    transcriptLoading?: boolean
   }): null {
     state = useMobileNativeChatDrafts({
       hostId: 'host',
@@ -57,7 +59,8 @@ describe('useMobileNativeChatDrafts', () => {
       tabId,
       sessionId,
       messages,
-      launchDraft
+      launchDraft,
+      transcriptLoading
     })
     return null
   }
@@ -793,6 +796,46 @@ describe('useMobileNativeChatDrafts', () => {
     expect(state?.composerText).toBe('issue link plus my notes')
   })
 
+  it('holds the launch draft until the transcript read settles', async () => {
+    // `session.tabs` carries launchDraft before the transcript loads. Seeding on
+    // the empty in-flight list would prefill an already-submitted issue link, and
+    // a send tapped before it retracts duplicates it to the agent.
+    await mount('a')
+    await act(async () =>
+      renderer?.update(
+        createElement(Harness, { tabId: 'a', launchDraft: 'issue link', transcriptLoading: true })
+      )
+    )
+    expect(state?.composerText).toBe('')
+
+    // The settled transcript already holds the submitted turn — decline for good.
+    await act(async () =>
+      renderer?.update(
+        createElement(Harness, {
+          tabId: 'a',
+          launchDraft: 'issue link',
+          messages: [userTextMessage('m1', 'already sent from the TUI')]
+        })
+      )
+    )
+    expect(state?.composerText).toBe('')
+  })
+
+  it('seeds once the transcript settles empty', async () => {
+    await mount('a')
+    await act(async () =>
+      renderer?.update(
+        createElement(Harness, { tabId: 'a', launchDraft: 'issue link', transcriptLoading: true })
+      )
+    )
+    expect(state?.composerText).toBe('')
+
+    await act(async () =>
+      renderer?.update(createElement(Harness, { tabId: 'a', launchDraft: 'issue link' }))
+    )
+    expect(state?.composerText).toBe('issue link')
+  })
+
   it('clears an untouched prefill when the host stops publishing the launch draft', async () => {
     await mount('a')
     await act(async () =>
diff --git a/mobile/src/session/use-mobile-native-chat-drafts.ts b/mobile/src/session/use-mobile-native-chat-drafts.ts
index 34bef478544..cb75940e808 100644
--- a/mobile/src/session/use-mobile-native-chat-drafts.ts
+++ b/mobile/src/session/use-mobile-native-chat-drafts.ts
@@ -43,6 +43,9 @@ export function useMobileNativeChatDrafts(args: {
   messages: readonly NativeChatMessage[]
   /** Host-provided launch context still parked as an unsent TUI-input draft. */
   launchDraft?: string | null
+  /** The transcript read is still in flight, so `messages` is not yet the
+   *  session's real history and cannot be trusted to decline the seed. */
+  transcriptLoading?: boolean
 }): {
   composerText: string
   setComposerText: Dispatch<SetStateAction<string>>
@@ -59,7 +62,7 @@ export function useMobileNativeChatDrafts(args: {
     onUnconfirmed: () => void
   ) => void
 } {
-  const { hostId, worktreeId, tabId, sessionId, messages, launchDraft } = args
+  const { hostId, worktreeId, tabId, sessionId, messages, launchDraft, transcriptLoading } = args
   const draftKey = mobileNativeChatScopeKey(hostId, worktreeId, tabId)
   const pendingKey = draftKey && sessionId ? `${draftKey}\0${sessionId}` : null
   const [drafts, setDrafts] = useState<Record<string, string>>({})
@@ -85,6 +88,12 @@ export function useMobileNativeChatDrafts(args: {
     if (!draftKey || !launchDraft?.trim() || seededLaunchDraftByKeyRef.current.has(draftKey)) {
       return
     }
+    // Why: `session.tabs` carries launchDraft before the transcript read settles,
+    // and an empty in-flight list would let the decline below miss an
+    // already-submitted prefill — long enough for a send to duplicate it.
+    if (transcriptLoading) {
+      return
+    }
     // A user turn already in the transcript means the one-line TUI prefill was
     // submitted or deliberately cleared; decline instead of resurrecting it.
     if (messages.some((message) => normalizedUserText(message) !== null)) {
@@ -95,7 +104,7 @@ export function useMobileNativeChatDrafts(args: {
     setDrafts((previous) =>
       (previous[draftKey] ?? '') === '' ? { ...previous, [draftKey]: launchDraft } : previous
     )
-  }, [draftKey, launchDraft, messages])
+  }, [draftKey, launchDraft, messages, transcriptLoading])
 
   // Drop an untouched adopted copy once the prefill is resolved elsewhere — a
   // user turn landed (sent or cleared TUI-side) or the host stopped publishing