diff --git a/apps/desktop/src/app/session/hooks/use-prompt-actions/index.test.tsx b/apps/desktop/src/app/session/hooks/use-prompt-actions/index.test.tsx
index e52defbc78..7ceff9f071 100644
--- a/apps/desktop/src/app/session/hooks/use-prompt-actions/index.test.tsx
+++ b/apps/desktop/src/app/session/hooks/use-prompt-actions/index.test.tsx
@@ -4708,6 +4708,78 @@ describe('usePromptActions busy-gateway churn tolerance (#64327)', () => {
     ])
   })
 
+  it('keeps an explicit background queue target isolated from foreground routed recovery (#90428)', async () => {
+    const FOREGROUND_STORED_ID = 'stored-foreground-b'
+    const FOREGROUND_RUNTIME_ID = 'rt-foreground-b'
+    const QUEUED_STORED_ID = 'stored-queued-c'
+    const QUEUED_RUNTIME_ID = 'rt-queued-c-recovered'
+    const calls: { method: string; params?: Record<string, unknown> }[] = []
+    const stateWrites: { sessionId: string; storedSessionId: null | string | undefined }[] = []
+    const selectedStoredSessionIdRef: MutableRefObject<string | null> = { current: FOREGROUND_STORED_ID }
+    const activeSessionIdRef: MutableRefObject<string | null> = { current: FOREGROUND_RUNTIME_ID }
+
+    const runtimeIdByStoredSessionIdRef: MutableRefObject<Map<string, string>> = {
+      current: new Map([[FOREGROUND_STORED_ID, FOREGROUND_RUNTIME_ID]])
+    }
+
+    const resumeStoredSession = vi.fn(async () => undefined)
+
+    const requestGateway = vi.fn(async (method: string, params?: Record<string, unknown>) => {
+      calls.push({ method, params })
+
+      if (method === 'session.resume') {
+        expect(params?.session_id).toBe(QUEUED_STORED_ID)
+
+        return { session_id: QUEUED_RUNTIME_ID } as never
+      }
+
+      return {} as never
+    })
+
+    let handle: HarnessHandle | null = null
+    render(
+      <Harness
+        activeSessionId={FOREGROUND_RUNTIME_ID}
+        activeSessionIdRef={activeSessionIdRef}
+        getRoutedStoredSessionId={() => FOREGROUND_STORED_ID}
+        getRouteToken={() => `/${FOREGROUND_STORED_ID}::`}
+        getRuntimeIdForStoredSession={storedId => runtimeIdByStoredSessionIdRef.current.get(storedId) ?? null}
+        onReady={h => (handle = h)}
+        onUpdateState={(sessionId, storedSessionId) => stateWrites.push({ sessionId, storedSessionId })}
+        refreshSessions={async () => undefined}
+        requestGateway={requestGateway}
+        resumeStoredSession={resumeStoredSession}
+        runtimeIdByStoredSessionIdRef={runtimeIdByStoredSessionIdRef}
+        selectedStoredSessionIdRef={selectedStoredSessionIdRef}
+        storedSessionId={FOREGROUND_STORED_ID}
+      />
+    )
+    await waitFor(() => expect(handle).not.toBeNull())
+
+    expect(
+      await handle!.submitText('queued prompt for C', {
+        fromQueue: true,
+        sessionId: null,
+        storedSessionId: QUEUED_STORED_ID
+      })
+    ).toBe(true)
+    expect(resumeStoredSession).not.toHaveBeenCalled()
+    expect(calls).toEqual([
+      {
+        method: 'session.resume',
+        params: { session_id: QUEUED_STORED_ID, source: 'desktop', omit_messages: true }
+      },
+      {
+        method: 'prompt.submit',
+        params: { session_id: QUEUED_RUNTIME_ID, text: 'queued prompt for C', queued: true }
+      }
+    ])
+    expect(stateWrites.some(write => write.sessionId === FOREGROUND_RUNTIME_ID)).toBe(false)
+    expect(selectedStoredSessionIdRef.current).toBe(FOREGROUND_STORED_ID)
+    expect(activeSessionIdRef.current).toBe(FOREGROUND_RUNTIME_ID)
+    expect(runtimeIdByStoredSessionIdRef.current).toEqual(new Map([[FOREGROUND_STORED_ID, FOREGROUND_RUNTIME_ID]]))
+  })
+
   it('still aborts when the user genuinely moves to a different chat mid-submit', async () => {
     // The churn tolerance must not weaken the real guard: selection AND route
     // moving to another actual chat is a user switch and must abort.
diff --git a/apps/desktop/src/app/session/hooks/use-prompt-actions/submit.ts b/apps/desktop/src/app/session/hooks/use-prompt-actions/submit.ts
index 97b060922f..033c7918b2 100644
--- a/apps/desktop/src/app/session/hooks/use-prompt-actions/submit.ts
+++ b/apps/desktop/src/app/session/hooks/use-prompt-actions/submit.ts
@@ -527,7 +527,7 @@ export function useSubmitPrompt(deps: SubmitPromptDeps) {
         scope.setMessages(current => [...current, buildUserMessage()])
       }
 
-      if (!sessionId && routedStoredSessionId && routedSessionNeedsResume) {
+      if (!options?.storedSessionId && !sessionId && routedStoredSessionId && routedSessionNeedsResume) {
         // The URL still names a durable conversation, but a profile
         // swap/reconnect left its volatile session binding incomplete or
         // cross-wired. Run the full profile-aware resume path. Creating here