diff --git a/src/main/ipc/pty/pane/terminal-spawn-restore.ts b/src/main/ipc/pty/pane/terminal-spawn-restore.ts
index 64bd819f568..52254555946 100644
--- a/src/main/ipc/pty/pane/terminal-spawn-restore.ts
+++ b/src/main/ipc/pty/pane/terminal-spawn-restore.ts
@@ -9,15 +9,17 @@ export function seedHeadlessTerminalFromSpawnResult(
   result: PtySpawnResult,
   paneKey: string | null
 ): void {
-  // Renderer-owned layout prefers its richer history; main-owned layout must seed the host copy every view restores.
-  if (
-    !runtime ||
-    (!ORCA_LAYOUT_OWNER_IS_MAIN && paneKey && pendingByPaneKey.has(paneKey)) ||
-    (result.isReattach === true && rendererSerializerReadiness.has(result.id))
-  ) {
+  if (!runtime || (result.isReattach === true && rendererSerializerReadiness.has(result.id))) {
     return
   }
+  // Renderer-owned layout prefers its richer history; main-owned layout must seed the host copy every view restores.
+  const rendererOwnsHistory = Boolean(
+    !ORCA_LAYOUT_OWNER_IS_MAIN && paneKey && pendingByPaneKey.has(paneKey)
+  )
   if (typeof result.snapshot === 'string' && result.snapshot.length > 0) {
+    if (rendererOwnsHistory) {
+      return
+    }
     const size =
       typeof result.snapshotCols === 'number' && typeof result.snapshotRows === 'number'
         ? { cols: result.snapshotCols, rows: result.snapshotRows }
@@ -29,6 +31,8 @@ export function seedHeadlessTerminalFromSpawnResult(
       ...(result.snapshotTerminalOwner ? { terminalOwner: result.snapshotTerminalOwner } : {})
     })
   } else if (
+    // Seed even when the renderer owns history: its xterm holds only this same payload, and a pane
+    // revealed after output arrived while hidden repaints from the host copy (STA-14063).
     result.coldRestore &&
     typeof result.coldRestore.scrollback === 'string' &&
     result.coldRestore.scrollback.length > 0
@@ -47,7 +51,11 @@ export function seedHeadlessTerminalFromSpawnResult(
       oscLinks: result.coldRestore.oscLinks,
       preferProviderIfExisting: true
     })
-  } else if (typeof result.replay === 'string' && result.replay.length > 0) {
+  } else if (
+    !rendererOwnsHistory &&
+    typeof result.replay === 'string' &&
+    result.replay.length > 0
+  ) {
     runtime.seedHeadlessTerminal(result.id, result.replay)
   }
 }
diff --git a/src/main/runtime/orca-runtime-tests/headless-snapshots.spec.ts b/src/main/runtime/orca-runtime-tests/headless-snapshots.spec.ts
index 79f6142e3b9..f25fb288f30 100644
--- a/src/main/runtime/orca-runtime-tests/headless-snapshots.spec.ts
+++ b/src/main/runtime/orca-runtime-tests/headless-snapshots.spec.ts
@@ -4,6 +4,12 @@ import { OrcaRuntimeService } from '../orca-runtime'
 import { setPlatform } from '../orca-runtime-test-mocks/setup.spec'
 import type { RuntimeTerminalAgentStatusEvent } from '../terminal/output/terminal-agent-status-events'
 import type { HeadlessEmulator } from '../../daemon/emulation/headless-emulator'
+import { makePaneKey } from '../../../shared/workspace-layout/stable-pane-id'
+import {
+  declarePendingPaneSerializer,
+  settlePendingPaneSerializer
+} from '../../ipc/pty/pane/serializer-state'
+import { seedHeadlessTerminalFromSpawnResult } from '../../ipc/pty/pane/terminal-spawn-restore'
 
 import {
   TEST_WORKTREE_ID,
@@ -240,6 +246,32 @@ describe('OrcaRuntimeService', () => {
     expect(runtime.resolveTerminalFileUriHostname(terminal.handle)).toBe('remote-host')
   })
 
+  it('retains cold-restored history in hidden-output recovery while renderer serialization is pending', async () => {
+    const runtime = createRuntime()
+    syncSinglePty(runtime, 'cold-pty')
+    const paneKey = makePaneKey('tab-1', '44444444-4444-4444-8444-444444444444')
+    const generation = declarePendingPaneSerializer(paneKey, undefined)
+    try {
+      seedHeadlessTerminalFromSpawnResult(
+        runtime,
+        {
+          id: 'cold-pty',
+          coldRestore: { scrollback: 'restored history\r\n', cwd: '/tmp', cols: 40, rows: 6 }
+        },
+        paneKey
+      )
+      runtime.onPtyData('cold-pty', 'fresh shell prompt $ ', 100)
+
+      const snapshot = await runtime.serializeHiddenOutputRecoveryBuffer('cold-pty', {
+        scrollbackRows: 100
+      })
+      expect(snapshot?.data).toContain('restored history')
+      expect(snapshot?.data).toContain('fresh shell prompt $ ')
+    } finally {
+      settlePendingPaneSerializer(paneKey, generation)
+    }
+  })
+
   it('falls back to the renderer snapshot for hidden-output recovery without headless state', async () => {
     const serializeBuffer = vi.fn().mockResolvedValue({
       data: '\x1b[?1049hRenderer TUI\r\nStill running\r\n',