From b2fb072d4a261f10f6d68e33a7eb53eb25a57b64 Mon Sep 17 00:00:00 2001
From: "Dustin L. Howett" <duhowett@microsoft.com>
Date: Mon, 11 May 2026 17:42:18 -0500
Subject: [PATCH] Reject DTTERM Window Manipulation resizes with the current
 size (#20183)

This may help #20182 and #20112
Closes #19310

(cherry picked from commit 3e3b3ad883d134bdab26850d42e2a8308da40086)
Service-Card-Id: PVTI_lADOAF3p4s4BBcTlzgr3jGI
Service-Version: 1.24
---
 src/cascadia/TerminalCore/TerminalApi.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/cascadia/TerminalCore/TerminalApi.cpp b/src/cascadia/TerminalCore/TerminalApi.cpp
index 825712028e..1dcd808c82 100644
--- a/src/cascadia/TerminalCore/TerminalApi.cpp
+++ b/src/cascadia/TerminalCore/TerminalApi.cpp
@@ -107,6 +107,13 @@ bool Terminal::ResizeWindow(const til::CoordType width, const til::CoordType hei
         return false;
     }
 
+    const auto currentDimensions = _GetMutableViewport().Dimensions();
+
+    if (width == currentDimensions.width && height == currentDimensions.height)
+    {
+        return false;
+    }
+
     if (_pfnWindowSizeChanged)
     {
         _pfnWindowSizeChanged(width, height);