Traffic from the firewall itself won't use the IPsec tunnel unless it matches the IPsec P2. Since IPsec is not routed, the firewall does not know well enough on its own that it needs to source the traffic in a special way in order to use the tunnel.
https://doc.pfsense.org/index.php/Why_can%27t_I_query_SNMP,_use_syslog,_NTP,_or_other_services_initiated_by_the_firewall_itself_over_IPsec_VPN