dhcpd with multiple interfaces on 2.8b3 snap doesn't start

Hello,

installed: 2.8.0~beta3-8439-g.a69fa79a1 (6308) 139MB -

I have the controller serving 2 subnets. If I enable DHCP on only one at a time things work on whichever is enabled, but if I try to enable DHCP on more than 1 interface I get something like the following error:

2020-05-07T11:07:26Z dhcpd[344577]: eno1.472 eno1.473: interface name too long (is 17)
2020-05-07T11:07:26Z dhcpd[344577]:
2020-05-07T11:07:26Z dhcpd[344577]: If you think you have received this message due to a bug rather
2020-05-07T11:07:26Z dhcpd[344577]: than a configuration issue please read the section on submitting
2020-05-07T11:07:26Z dhcpd[344577]: bugs on either our web page at www.isc.org or in the README file
2020-05-07T11:07:26Z dhcpd[344577]: before submitting a bug. These pages explain the proper
2020-05-07T11:07:26Z dhcpd[344577]: process and the information we find helpful for debugging..
2020-05-07T11:07:26Z dhcpd[344577]:
2020-05-07T11:07:26Z dhcpd[344577]: exiting.

Which looks like it's treating the dhcpd-interfaces file contents as a single string. Just to try something quick, I modified the run-dhcpd supervisord script and pointed the config to a modifiable location to remove the quotes around "$INTERFACES". Once I did that, things seem to start and work fine.

--- /snap/maas/6308/bin/run-dhcpd 2020-05-01 20:18:09.000000000 +0200
+++ /var/snap/maas/6308/bin/run-dhcpd 2020-05-07 13:17:43.899613147 +0200
@@ -23,4 +23,4 @@
 touch "$LEASES_FILE"
 "$SNAP/usr/sbin/maas-dhcp-helper" clean "$LEASES_FILE"

-exec "$SNAP/usr/sbin/dhcpd" -f -4 -pf "$DHCP_DIR/dhcpd.pid" -cf "$DHCP_CONFIG" -lf "$LEASES_FILE" "$INTERFACES"
+exec "$SNAP/usr/sbin/dhcpd" -f -4 -pf "$DHCP_DIR/dhcpd.pid" -cf "$DHCP_CONFIG" -lf "$LEASES_FILE" $INTERFACES

Cheers,
Mark