I encountered two unexpected behaviors and would like to get some advice.

# fail2ban-client status
Status
|- Number of jail:	1
`- Jail list:	sshd
# nft list ruleset
table inet f2b-table {
	set addr-set-pass2allow-ftp {
		type ipv4_addr
	}

	set addr6-set-pass2allow-ftp {
		type ipv6_addr
	}

	set addr-set-sshd {
		type ipv4_addr
	}

	chain f2b-chain {
		type filter hook input priority filter - 1; policy accept;
		meta l4proto tcp ip saddr @addr-set-sshd reject with icmp port-unreachable
	}
}