diff --git a/cura/Scene/BuildPlateDecorator.py b/cura/Scene/BuildPlateDecorator.py
index c2fd3145dd..dfb465b7ad 100644
--- a/cura/Scene/BuildPlateDecorator.py
+++ b/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)
 
diff --git a/plugins/3MFReader/ThreeMFReader.py b/plugins/3MFReader/ThreeMFReader.py
index 9b7b979e8a..6c2fb9a59d 100755
--- a/plugins/3MFReader/ThreeMFReader.py
+++ b/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)