Fix loading parented objects from 3mf files

cura/Scene/BuildPlateDecorator.py

@@ -15,7 +15,7 @@ class BuildPlateDecorator(SceneNodeDecorator):
         self._build_plate_number = nr
         if isinstance(self._node, CuraSceneNode):
             self._node.transformChanged()  # trigger refresh node without introducing a new signal
-        if self._node and self._node.callDecoration("isGroup"):
+        if self._node:
             for child in self._node.getChildren():
                 child.callDecoration("setBuildPlateNumber", nr)
 

plugins/3MFReader/ThreeMFReader.py

@@ -137,7 +137,7 @@ class ThreeMFReader(MeshReader):
                     continue
                 setting_container.setProperty(key, "value", setting_value)
 
-        if len(um_node.getChildren()) > 0:
+        if len(um_node.getChildren()) > 0 and um_node.getMeshData() is None:
             group_decorator = GroupDecorator()
             um_node.addDecorator(group_decorator)
         um_node.setSelectable(True)