diff --git a/web_advanced_search/static/src/js/web_advanced_search.js b/web_advanced_search/static/src/js/web_advanced_search.js
index 146332052..2cb4f1ec2 100644
--- a/web_advanced_search/static/src/js/web_advanced_search.js
+++ b/web_advanced_search/static/src/js/web_advanced_search.js
@@ -77,15 +77,19 @@ odoo.define("web_advanced_search", function(require) {
         }),
 
         /**
-         * Handle dropdown hidden event to prevent the menu from closing when using a 
-         * relational field 
+         * Handle dropdown hidden event to prevent the menu from closing when using a
+         * relational field
          *
          * @override
          */
-        start: function () {
+        start: function() {
             this._super.apply(this, arguments);
-            this.$el.on('hide.bs.dropdown', function() {
-                return !($('.o_technical_modal.show').length || $('body.oe_wait').length);
+            this.$el.on("hide.bs.dropdown", function() {
+                var $modal = $(".o_technical_modal.show");
+                return !(
+                    ($modal.length && !$modal.has($(this)).length) ||
+                    $("body.oe_wait").length
+                );
             });
         },