diff --git a/web/third/bootstrap-typeahead/typeahead.js b/web/third/bootstrap-typeahead/typeahead.js
index 1971b4d87a..506755b68f 100644
--- a/web/third/bootstrap-typeahead/typeahead.js
+++ b/web/third/bootstrap-typeahead/typeahead.js
@@ -439,6 +439,7 @@ import {get_string_diff} from "../../src/util";
   , keydown: function (e) {
     const pseudo_keycode = get_pseudo_keycode(e);
     if (this.trigger_selection(e)) {
+      if (!this.shown) return;
       e.preventDefault();
       this.select(e);
     }
@@ -473,11 +474,6 @@ import {get_string_diff} from "../../src/util";
           }
           break
 
-        // to stop typeahead from showing up momentarily
-        // when shift + tabbing to a field with typeahead
-        case 16: // shift
-          return
-
         default:
           var hideOnEmpty = false
           if (e.keyCode === 8 && this.options.helpOnEmptyStrings) { // backspace