Steps to reproduce:

1. Open the trigger configuration form.
2. Enter a new value for Event name field.
3. Press the Enter key to save.
4. When the alert message appears, press Enter again to confirm it.

Result: After confirming the alert, the user is redirected to the zabbix.php page.

Expected: The user successfully updates the trigger configuration and is redirected to the list of triggers for the previously selected host.

Note: The issue may not reproduce immediately. Try successfully updating the trigger configuration first, then repeat this scenario again.