diff --git a/src/bonsai/bonsai/bim/module/material/operator.py b/src/bonsai/bonsai/bim/module/material/operator.py
index fe733031f9..ac56232a1e 100644
--- a/src/bonsai/bonsai/bim/module/material/operator.py
+++ b/src/bonsai/bonsai/bim/module/material/operator.py
@@ -751,8 +751,6 @@ class ExpandMaterialCategory(bpy.types.Operator):
                 props.active_material_index = index
             break
         core.load_materials(tool.Material, props.material_type)
-        # Update UI data as material_styles_data depends on props.materials.
-        bonsai.bim.handler.refresh_ui_data()
         return {"FINISHED"}
 
 
diff --git a/src/bonsai/bonsai/tool/material.py b/src/bonsai/bonsai/tool/material.py
index 99fcef9a4a..7fdc70f854 100644
--- a/src/bonsai/bonsai/tool/material.py
+++ b/src/bonsai/bonsai/tool/material.py
@@ -134,6 +134,10 @@ class Material(bonsai.core.tool.Material):
             new.ifc_definition_id = material.id()
             new.total_elements = len(ifcopenshell.util.element.get_elements_by_material(tool.Ifc.get(), material))
 
+        from bonsai.bim.module.material.data import MaterialsData
+
+        MaterialsData.data["material_styles_data"] = MaterialsData.material_styles_data()
+
     @classmethod
     def is_editing_materials(cls) -> bool:
         return bpy.context.scene.BIMMaterialProperties.is_editing