diff -r 1a95de56dadc -r e6415fd4af4b ui/motif/menu.c
--- a/ui/motif/menu.c	Sun Apr 06 13:54:28 2025 +0200
+++ b/ui/motif/menu.c	Sun Apr 06 14:10:04 2025 +0200
@@ -202,6 +202,20 @@
     ui_bind_radiobutton(obj, button, NULL, it->varname, it->callback, it->userdata, 0);
 }
 
+static void menuitem_list_remove_binding(void *obj) {
+    UiActiveMenuItemList *ls = obj;
+    UiList *list = ls->var->value;
+    CxList *bindings = list->obj;
+    if(bindings) {
+        (void)cxListFindRemove(bindings, obj);
+        if(cxListSize(bindings) == 0) {
+            cxListFree(bindings);
+            list->obj = NULL;
+            list->update = NULL;
+        }
+    }
+}
+
 void add_menuitem_list_widget(Widget p, int i, UiMenuItemI *item, UiObject *obj) {
     UiMenuItemList *il = (UiMenuItemList*)item;
     const CxAllocator *a = obj->ctx->allocator;
@@ -218,17 +232,40 @@
     ls->userdata = il->userdata;
     ls->addseparator = il->addseparator;
     
-    ls->var = uic_create_var(ui_global_context(), il->varname, UI_VAR_LIST); //uic_widget_var(obj->ctx, obj->ctx, NULL, il->varname, UI_VAR_LIST);
-    UiList *list = ls->var->value;
-    
-    UiObserver *observer = ui_observer_new((ui_callback)ui_update_menuitem_list, ls);
-    list->observers = ui_obsvlist_add(list->observers, observer);
-    uic_list_register_observer_destructor(obj->ctx, list, observer);
-    
-    ui_update_menuitem_list(NULL, ls);
+    //ls->var = uic_create_var(ui_global_context(), il->varname, UI_VAR_LIST);
+    ls->var = uic_create_var(obj->ctx, il->varname, UI_VAR_LIST);
+    if(ls->var) {
+        UiList *list = ls->var->value;
+        list->update = ui_menulist_update;
+        list->getselection = NULL;
+        list->setselection = NULL;
+        
+        // It is possible, that the UiVar is from a global shared context,
+        // used by multiple windows. To support this usecase, the list->obj
+        // binding object is a list of all connected UiActiveMenuItemList.
+        CxList *bindings = list->obj;
+        if(!bindings) {
+            bindings = cxLinkedListCreate(ls->var->from_ctx->mp->allocator, NULL, CX_STORE_POINTERS);
+            list->obj = bindings;
+        }
+        cxListAdd(bindings, ls);
+        
+        // The destruction of the toplevel obj must remove the menulist binding
+        uic_context_add_destructor(obj->ctx, menuitem_list_remove_binding, ls);
+        
+        ui_update_menuitem_list(ls);
+    }
 }
 
-void ui_update_menuitem_list(UiEvent *event, UiActiveMenuItemList *list) {
+void ui_menulist_update(UiList *list, int ignored) {
+    CxList *bindings = list->obj;
+    CxIterator i = cxListIterator(bindings);
+    cx_foreach(UiActiveMenuItemList *, ls, i) {
+        ui_update_menuitem_list(ls);
+    }
+}
+
+void ui_update_menuitem_list(UiActiveMenuItemList *list) {
     XmString s = NULL;
     Arg args[4];
     int n;