diff --git a/source/blender/editors/interface/interface_templates.c b/source/blender/editors/interface/interface_templates.c
index 1d55e2b3e4b..6295f51f01e 100644
--- a/source/blender/editors/interface/interface_templates.c
+++ b/source/blender/editors/interface/interface_templates.c
@@ -1860,6 +1860,13 @@ void uiTemplateModifiers(uiLayout *UNUSED(layout), bContext *C)
       }
     }
   }
+  else {
+    /* The expansion might have been changed elsewhere, so we still need to set it. */
+    LISTBASE_FOREACH (Panel *, panel, &region->panels) {
+      if ((panel->type != NULL) && (panel->type->flag & PNL_INSTANCED))
+        UI_panel_set_expand_from_list_data(C, panel);
+    }
+  }
 }
 
 /** \} */
diff --git a/source/blender/makesrna/intern/rna_modifier.c b/source/blender/makesrna/intern/rna_modifier.c
index a0026797c68..92eec6190da 100644
--- a/source/blender/makesrna/intern/rna_modifier.c
+++ b/source/blender/makesrna/intern/rna_modifier.c
@@ -6877,6 +6877,7 @@ void RNA_def_modifier(BlenderRNA *brna)
   RNA_def_property_override_flag(prop, PROPOVERRIDE_OVERRIDABLE_LIBRARY);
   RNA_def_property_ui_text(prop, "Expanded", "Set modifier expanded in the user interface");
   RNA_def_property_ui_icon(prop, ICON_DISCLOSURE_TRI_RIGHT, 1);
+  RNA_def_property_update(prop, NC_OBJECT | ND_MODIFIER, NULL);
 
   prop = RNA_def_property(srna, "use_apply_on_spline", PROP_BOOLEAN, PROP_NONE);
   RNA_def_property_boolean_sdna(prop, NULL, "mode", eModifierMode_ApplyOnSpline);