From 2d97fddddc252441e8d8476eb2c2836e955d95c2 Mon Sep 17 00:00:00 2001
From: Neil <4138956+nwparker@users.noreply.github.com>
Date: Wed, 17 Jun 2026 02:30:29 -0700
Subject: [PATCH] Keep hidden startup query parser active during window

---
 .../src/components/terminal-pane/pty-connection.ts        | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/renderer/src/components/terminal-pane/pty-connection.ts b/src/renderer/src/components/terminal-pane/pty-connection.ts
index cf2e7eb2401..f00be9964b0 100644
--- a/src/renderer/src/components/terminal-pane/pty-connection.ts
+++ b/src/renderer/src/components/terminal-pane/pty-connection.ts
@@ -2850,7 +2850,13 @@ export function connectPanePty(
     }
 
     function isHiddenStartupRendererQueryWindowActive(): boolean {
-      return shouldSnapshotHiddenCodexOutput && hiddenStartupRendererQueryPending.length > 0
+      return (
+        shouldSnapshotHiddenCodexOutput &&
+        // Why: non-query bytes during the startup window can dirty hidden xterm
+        // state, so the parser must observe them before answering CPR/DECRQM.
+        (Date.now() < hiddenStartupRendererQueryWindowExpiresAt ||
+          hiddenStartupRendererQueryPending.length > 0)
+      )
     }
 
     function takeHiddenStartupRendererQueryPendingForForeground(data: string): {