From b605c5c4527013f568d37b85975103059933b9b3 Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Fri, 27 May 2022 10:51:37 +0100
Subject: [PATCH] [OSX] fix border shadow invalidation.

---
 native/Avalonia.Native/src/OSX/WindowBaseImpl.mm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/native/Avalonia.Native/src/OSX/WindowBaseImpl.mm b/native/Avalonia.Native/src/OSX/WindowBaseImpl.mm
index 022769bad0..6dc59ae4d8 100644
--- a/native/Avalonia.Native/src/OSX/WindowBaseImpl.mm
+++ b/native/Avalonia.Native/src/OSX/WindowBaseImpl.mm
@@ -296,6 +296,7 @@ HRESULT WindowBaseImpl::Resize(double x, double y, AvnPlatformResizeReason reaso
 
             if(Window != nullptr) {
                 [Window setContentSize:lastSize];
+                [Window invalidateShadow];
             }
         }
         @finally {
@@ -583,6 +584,8 @@ void WindowBaseImpl::InitialiseNSWindow() {
         [Window setContentMaxSize:lastMaxSize];
 
         [Window setOpaque:false];
+        
+        [Window invalidateShadow];
 
         if (lastMenu != nullptr) {
             [GetWindowProtocol() applyMenu:lastMenu];