unbound listening sporadically on 0.0.0.0 high ports when configured for 127.0.0.1 ?

[Paul Wouters via Unbound-users]

See https://bugzilla.redhat.com/show_bug.cgi?id=1342105

        from time to time "netstat -l" shows unbound listening on some 
high-ports not
        bound to 127.0.0.1 - that makes no sense when the service is configured 
for
        127.0.0.1 only as a local resolver on a inbound mailfilter

        udp        0      0 0.0.0.0:42663           0.0.0.0:*
        563/unbound
        udp        0      0 127.0.0.1:53            0.0.0.0:*
        563/unbound
        udp        0      0 0.0.0.0:12387           0.0.0.0:*
        563/unbound

        unbound.conf
         interface: 127.0.0.1
         access-control: 127.0.0.0/8 allow
         interface-automatic: no

Paul