diff --git a/web_advanced_search/static/src/js/owl/dropdown.esm.js b/web_advanced_search/static/src/js/owl/dropdown.esm.js
new file mode 100644
index 000000000..959d270c7
--- /dev/null
+++ b/web_advanced_search/static/src/js/owl/dropdown.esm.js
@@ -0,0 +1,20 @@
+/** @odoo-module **/
+
+import {Dropdown} from "@web/core/dropdown/dropdown";
+import {patch} from "web.utils";
+
+patch(Dropdown.prototype, "web.Dropdown", {
+    /**
+     * Our many2one widget in the filter menus has a dropdown that propagates some
+     * custom events through the bus to the search more pop-up. This is not replicable
+     * in core but we can simply cut it here
+     * @override
+     */
+    onDropdownStateChanged(args) {
+        const direct_siblings = args.emitter.el.parentElement === this.el.parentElement;
+        if (!direct_siblings && args.emitter.myActiveEl !== this.myActiveEl) {
+            return;
+        }
+        return this._super(...arguments);
+    },
+});