We have started getting random “405 not allowed” errors upon submitting a form. The entries however do come into our database but they arrive as duplicates. The 405 error displays after about a minute (with no url change). For what it’s worth, I have noticed that if we set an auto responder email alert, the 405 error is not displayed and the “thanks for your submission” message works fine? Can you advise as to what might be the issue?