It may be that the relay is generally not working since the new update. Unfortunately, I have the same problem that the relay sends IP addresses only sporadically. One day later it doesn't do that anymore.
See here: https://forum.opnsense.org/index.php?topic=28592.msg138889#msg138889
See here: https://forum.opnsense.org/index.php?topic=28592.msg138889#msg138889