I enabled tracing on pdns-recursor and study the logs. The recursor tried to resolve via the ip 0.0.10.240 first after restart. That's not configured and looks like an "internal" value.
What does pds-recursor trying here? What is this ip for?
Jan 21 17:30:22 XXXXX pdns_recursor[498463]: [1] XXXXX.YYYYY.ZZZ: Nameservers: +0.0.10.240:18(0.00ms), +x.x.x.x:53(0.00ms)
