From 51dd4c1869a9300665853a33742bffac3bc2b11e Mon Sep 17 00:00:00 2001
From: Kacper Donat <kadet1090@gmail.com>
Date: Mon, 25 Aug 2025 22:45:50 +0200
Subject: [PATCH] Gui: Do not compute preview while restoring

---
 src/Mod/Part/Gui/ViewProviderPreviewExtension.cpp  | 7 ++++++-
 src/Mod/PartDesign/Gui/ViewProviderTransformed.cpp | 4 ++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/Mod/Part/Gui/ViewProviderPreviewExtension.cpp b/src/Mod/Part/Gui/ViewProviderPreviewExtension.cpp
index 24fd32232d..ce9eea3c34 100644
--- a/src/Mod/Part/Gui/ViewProviderPreviewExtension.cpp
+++ b/src/Mod/Part/Gui/ViewProviderPreviewExtension.cpp
@@ -34,6 +34,7 @@
 #include "ViewProviderPreviewExtension.h"
 #include "ViewProviderExt.h"
 
+#include <App/Document.h>
 #include <Gui/Utilities.h>
 #include <Gui/Inventor/So3DAnnotation.h>
 #include <Mod/Part/App/Tools.h>
@@ -141,7 +142,11 @@ void ViewProviderPreviewExtension::extensionAttach(App::DocumentObject* document
     pcPreviewShape = new SoPreviewShape;
 
     attachPreview();
-    updatePreview();
+
+    auto document = documentObject->getDocument();
+    if (!document->testStatus(App::Document::Restoring)) {
+        updatePreview();
+    }
 }
 
 void ViewProviderPreviewExtension::extensionBeforeDelete()
diff --git a/src/Mod/PartDesign/Gui/ViewProviderTransformed.cpp b/src/Mod/PartDesign/Gui/ViewProviderTransformed.cpp
index d88d39d0be..861a35144c 100644
--- a/src/Mod/PartDesign/Gui/ViewProviderTransformed.cpp
+++ b/src/Mod/PartDesign/Gui/ViewProviderTransformed.cpp
@@ -101,6 +101,10 @@ void ViewProviderTransformed::attachPreview()
 
 void ViewProviderTransformed::updatePreview()
 {
+    if (pcObject->getDocument()->testStatus(App::Document::Restoring)) {
+        return;
+    }
+
     try {
         if (auto feature = getObject<PartDesign::Transformed>()) {
             auto originals = feature->getOriginals();