Unbound stops after pfblocker cron job or other cause?

[armstrtb]

I think this may be the wrong location to post it, may be better for unbound and happy to move it if that's the case but I've been troubleshooting my recent pfBlockerNG install and it felt like it fit.

Looks like Unbound stops running after a restart, and I think it's related to the DNSBL list being so large and the restart function not waiting long enough.

Similar to this:
It looks reminiscent of this: [Solved] Unbound fails on restart after pfBlockerNG updates
But it was fixed: redmine, so I didn't think I needed to repeat these steps as it was from 2017.

Version:
pfSense 2.4.5_1
pfBlockerNG-devel 3.0.0_7

I've parsed through my logs and summarised what looked like the main points across System, dhcp, and resolver logs. I think the issue occurs at 6:24:11 and I think it's related to the size of the DNSBL list.

Jan  6 06:00:01 pfSense php: [pfBlockerNG] Starting cron process.
Jan  6 06:22:26 pfSense rc.gateway_alarm[7737]: >>> Gateway alarm: WAN_DHCP (Addr:198.48.177.1 Alarm:0 RTT:17.144ms RTTsd:12.109ms Loss:5%)
Jan  6 06:22:26 pfSense check_reload_status: Restarting ipsec tunnels
Jan  6 06:22:26 pfSense check_reload_status: Restarting OpenVPN tunnels/interfaces
Jan  6 06:22:26 pfSense check_reload_status: Reloading filter
Jan  6 06:22:27 pfSense php-fpm[350]: /rc.openvpn: Gateway, none 'available' for inet6, use the first one configured. ''
Jan  6 06:22:27 pfSense php-fpm[350]: /rc.openvpn: OpenVPN: One or more OpenVPN tunnel endpoints may have changed its IP. Reloading endpoints that may use WAN_DHCP.
Jan  6 06:22:28 pfSense php-fpm[62801]: /rc.dyndns.update: phpDynDNS (XXXXXX.XXX.XXX): No change in my IP address and/or 25 days has not passed. Not updating dynamic DNS entry.
Jan  6 06:23:21 pfSense check_reload_status: Starting packages
Jan  6 06:23:22 pfSense php-fpm[62801]: /rc.start_packages: Restarting/Starting all packages.
Jan  6 06:23:27 pfSense lighttpd_pfb: [pfBlockerNG] DNSBL Webserver started
Jan  6 06:23:28 pfSense php_pfb: [pfBlockerNG] filterlog daemon started
Jan  6 06:23:28 pfSense php: [pfBlockerNG] DNSBL parser daemon started
Jan  6 06:23:56 pfSense php-fpm[350]: /rc.newwanip: The command '/usr/local/sbin/unbound -c /var/unbound/unbound.conf' returned exit code '1', the output was '[1609932236] unbound[94839:0] error: bind: address already in use [1609932236] unbound[94839:0] fatal error: could not open ports' 
Jan  6 06:23:58 pfSense dhcpd: Server starting service.
Jan  6 06:23:59 pfSense php-fpm[350]: /rc.newwanip: Creating rrd update script
Jan  6 06:24:01 pfSense php-fpm[350]: /rc.newwanip: pfSense package system has detected an IP change or dynamic WAN reconnection - 10.7.3.2 ->  10.7.0.3 - Restarting packages.
Jan  6 06:24:01 pfSense check_reload_status: Starting packages
Jan  6 06:24:10 pfSense unbound: [76661:0] notice: init module 0: iterator
Jan  6 06:24:11 pfSense unbound: [76661:0] info: start of service (unbound 1.10.1).
Jan  6 06:24:11 pfSense unbound: [76661:0] info: service stopped (unbound 1.10.1).