diff --git a/cura/Settings/SettingOverrideDecorator.py b/cura/Settings/SettingOverrideDecorator.py
index 429e6d16ec..f82d718398 100644
--- a/cura/Settings/SettingOverrideDecorator.py
+++ b/cura/Settings/SettingOverrideDecorator.py
@@ -73,8 +73,8 @@ class SettingOverrideDecorator(SceneNodeDecorator):
 
         # use value from the stack because there can be a delay in signal triggering and "_is_non_printing_mesh"
         # has not been updated yet.
-        deep_copy._is_non_printing_mesh = self.evaluateIsNonPrintingMesh()
-        deep_copy._is_non_thumbnail_visible_mesh = self.evaluateIsNonThumbnailVisibleMesh()
+        deep_copy._is_non_printing_mesh = self._evaluateIsNonPrintingMesh()
+        deep_copy._is_non_thumbnail_visible_mesh = self._evaluateIsNonThumbnailVisibleMesh()
 
         return deep_copy
 
@@ -102,20 +102,20 @@ class SettingOverrideDecorator(SceneNodeDecorator):
     def isNonPrintingMesh(self):
         return self._is_non_printing_mesh
 
-    def evaluateIsNonPrintingMesh(self):
+    def _evaluateIsNonPrintingMesh(self):
         return any(bool(self._stack.getProperty(setting, "value")) for setting in self._non_printing_mesh_settings)
 
     def isNonThumbnailVisibleMesh(self):
         return self._is_non_thumbnail_visible_mesh
 
-    def evaluateIsNonThumbnailVisibleMesh(self):
+    def _evaluateIsNonThumbnailVisibleMesh(self):
         return any(bool(self._stack.getProperty(setting, "value")) for setting in self._non_thumbnail_visible_settings)
 
     def _onSettingChanged(self, instance, property_name): # Reminder: 'property' is a built-in function
         if property_name == "value":
             # Trigger slice/need slicing if the value has changed.
-            self._is_non_printing_mesh = self.evaluateIsNonPrintingMesh()
-            self._is_non_thumbnail_visible_mesh = self.evaluateIsNonThumbnailVisibleMesh()
+            self._is_non_printing_mesh = self._evaluateIsNonPrintingMesh()
+            self._is_non_thumbnail_visible_mesh = self._evaluateIsNonThumbnailVisibleMesh()
 
             Application.getInstance().getBackend().needsSlicing()
             Application.getInstance().getBackend().tickle()
diff --git a/plugins/CuraEngineBackend/StartSliceJob.py b/plugins/CuraEngineBackend/StartSliceJob.py
index ef97364118..d9e1a7806d 100644
--- a/plugins/CuraEngineBackend/StartSliceJob.py
+++ b/plugins/CuraEngineBackend/StartSliceJob.py
@@ -196,10 +196,7 @@ class StartSliceJob(Job):
                 has_printing_mesh = False
                 for node in DepthFirstIterator(self._scene.getRoot()): #type: ignore #Ignore type error because iter() should get called automatically by Python syntax.
                     if node.callDecoration("isSliceable") and node.getMeshData() and node.getMeshData().getVertices() is not None:
-                        per_object_stack = node.callDecoration("getStack")
-                        is_non_printing_mesh = False
-                        if per_object_stack:
-                            is_non_printing_mesh = any(per_object_stack.getProperty(key, "value") for key in NON_PRINTING_MESH_SETTINGS)
+                        is_non_printing_mesh = bool(node.callDecoration("isNonPrintingMesh"))
 
                         # Find a reason not to add the node
                         if node.callDecoration("getBuildPlateNumber") != self._build_plate_number: