diff --git a/cura/Settings/CuraFormulaFunctions.py b/cura/Settings/CuraFormulaFunctions.py
index d7b6228e090..93a4de28ec4 100644
--- a/cura/Settings/CuraFormulaFunctions.py
+++ b/cura/Settings/CuraFormulaFunctions.py
@@ -56,6 +56,9 @@ def getValueInExtruder(self, extruder_position: int, property_key: str,
         if isinstance(value, SettingFunction):
             value = value(extruder_stack, context = context)
 
+        if isinstance(value, str):
+            value = value.lower()
+
         return value
 
     def _getActiveExtruders(self, context: Optional["PropertyEvaluationContext"] = None) -> List[str]:
diff --git a/cura/UI/ObjectsModel.py b/cura/UI/ObjectsModel.py
index 884d516f08f..4f642702474 100644
--- a/cura/UI/ObjectsModel.py
+++ b/cura/UI/ObjectsModel.py
@@ -69,7 +69,7 @@ def __init__(self, parent = None) -> None:
         self._group_name_template = catalog.i18nc("@label", "Group #{group_nr}")
         self._group_name_prefix = self._group_name_template.split("#")[0]
 
-        self._naming_regex = re.compile("^(.+)\(([0-9]+)\)$")
+        self._naming_regex = re.compile(r"^(.+)\(([0-9]+)\)$")
 
     def setActiveBuildPlate(self, nr: int) -> None:
         if self._build_plate_number != nr:
diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index d0d02363de7..ec07872e197 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -4534,7 +4534,7 @@
                             "type": "extruder",
                             "default_value": "0",
                             "value": "support_extruder_nr",
-                            "enabled": "(support_enable or support_meshes_present) and extruders_enabled_count > 1",
+                            "enabled": "(support_enable or support_meshes_present) and extruders_enabled_count > 1 and support_interface_enable",
                             "resolve": "max(extruderValues('support_interface_extruder_nr'))",
                             "settable_per_mesh": false,
                             "settable_per_extruder": false,
@@ -4547,7 +4547,7 @@
                                     "type": "extruder",
                                     "default_value": "0",
                                     "value": "support_interface_extruder_nr",
-                                    "enabled": "(support_enable or support_meshes_present) and extruders_enabled_count > 1",
+                                    "enabled": "(support_enable or support_meshes_present) and extruders_enabled_count > 1 and support_roof_enable",
                                     "resolve": "max(extruderValues('support_roof_extruder_nr'))",
                                     "settable_per_mesh": false,
                                     "settable_per_extruder": false
@@ -4559,7 +4559,7 @@
                                     "type": "extruder",
                                     "default_value": "0",
                                     "value": "support_interface_extruder_nr",
-                                    "enabled": "(support_enable or support_meshes_present) and extruders_enabled_count > 1",
+                                    "enabled": "(support_enable or support_meshes_present) and extruders_enabled_count > 1 and support_bottom_enable",
                                     "resolve": "max(extruderValues('support_bottom_extruder_nr'))",
                                     "settable_per_mesh": false,
                                     "settable_per_extruder": false