I’m having this same problem. I created the three line script @anon42188109 created and every time I run it, the output is:
Stopping DHCP Server... [ OK ]
Stopping Unbound DHCP Leases Bridge... [ WARN ]
Starting DHCP Server... [ OK ]
Stopping Unbound DNS Proxy... [ OK ]
Starting Unbound DNS Proxy... [ OK ]
I’m not sure where to look for the Unbound DHCP Leases Bridge output but if I manually run
/usr/sbin/unbound-dhcp-leases-bridge -vv
it does not exit.