diff --git a/cura/Settings/CuraContainerStack.py b/cura/Settings/CuraContainerStack.py
index c8d1d9e370..0ec95e2e41 100755
--- a/cura/Settings/CuraContainerStack.py
+++ b/cura/Settings/CuraContainerStack.py
@@ -291,7 +291,7 @@ class CuraContainerStack(ContainerStack):
 
     # Helper to make sure we emit a PyQt signal on container changes.
     def _onContainersChanged(self, container: Any) -> None:
-        self.pyqtContainersChanged.emit()
+        Application.getInstance().callLater(self.pyqtContainersChanged.emit)
 
     # Helper that can be overridden to get the "machine" definition, that is, the definition that defines the machine
     # and its properties rather than, for example, the extruder. Defaults to simply returning the definition property.
diff --git a/resources/qml/Preferences/Materials/MaterialsList.qml b/resources/qml/Preferences/Materials/MaterialsList.qml
index cb5de685e2..00bead9650 100644
--- a/resources/qml/Preferences/Materials/MaterialsList.qml
+++ b/resources/qml/Preferences/Materials/MaterialsList.qml
@@ -17,9 +17,23 @@ Item
 
     // Children
     UM.I18nCatalog { id: catalog; name: "cura"; }
-    Cura.MaterialBrandsModel { id: materialsModel }
-    Cura.FavoriteMaterialsModel { id: favoriteMaterialsModel }
-    Cura.GenericMaterialsModel { id: genericMaterialsModel }
+    Cura.MaterialBrandsModel
+    {
+        id: materialsModel
+        extruderPosition: Cura.ExtruderManager.activeExtruderIndex
+    }
+
+    Cura.FavoriteMaterialsModel
+    {
+        id: favoriteMaterialsModel
+        extruderPosition: Cura.ExtruderManager.activeExtruderIndex
+    }
+
+    Cura.GenericMaterialsModel
+    {
+        id: genericMaterialsModel
+        extruderPosition: Cura.ExtruderManager.activeExtruderIndex
+    }
 
     property var currentType: null
     property var currentBrand: null