An out of state packet is one that was part of an established session but that session has since been torn down. All of those blocks are for a FIN ACK (or FIN PUSH ACK), you will note. The pfSense side says "I'm going to tear this connection down and close it!" The other side says "OK", but pfSense has already torn the connection down so it sees the OK reply as an unsolicited new connection attempt and blocks it.
https://doc.pfsense.org/index.php/Why_do_my_logs_show_%22blocked%22_for_traffic_from_a_legitimate_connection