Restart DHCP Relay after OpenVPN Tunnel comes up

[Leland]

I have noticed that running pfSense 2.4.5, I am seeing intermittent DHCP relay failures if the OpenVPN TAP tunnel bounces. If I restart the DHCP Relay Service after the tunnel comes back up, everything works correctly. Is there a way to restart the DHCP Relay Service after the OpenVPN tunnel comes back up via CLI or script? I am trying to automate the DHCP Relay service to restart anytime the VPN tunnel comes back up.
Thanks