diff --git a/include/functions_announce.php b/include/functions_announce.php
index dd63e5b1..1aa18c72 100644
--- a/include/functions_announce.php
+++ b/include/functions_announce.php
@@ -81,6 +81,10 @@ function err($msg)
  */
 function warn($msg, int $interval = 7200)
 {
+    if (!empty($GLOBALS['event'])) {
+        //force return err, otherwise event will be lost in the next announce request
+        return err($msg);
+    }
     $d = get_resp_dict_from_global();
     $d['warning message'] = $msg;
     if ($interval > 0) {