After upgrade to 9.3 trying to enable DHCP in existing jails does not work

I upgraded to 9.3 and wanted to change some of the existing jails to use dhcp. Editing the jail config to use dhcp does not work, the jail does not get an ip.

I have set up several new jails with the dhcp option and they work fine, and get their ip from the dhcp server.

I'm not sure if this is a true bug or if I am just overlooking something.