In https://opnsense/ui/firewall/source_nat#:
Since I believe our Firewall Rule Migration, when you create a Source NAT Firewall rule, and try to select a port alias you have created that is a numeric port/portrange the UI will tell you that you must use a port name word to select that port.
The error message:
Please specify a valid port number (1-65535). A service name is also possible (afs3-fileserver, aol, auth, avt-profile-1, cvsup, domain, ftp, hbci, http, https, igmpv3lite, imap, imaps, ipsec-msft, ipsec-nat-t, isakmp, l2f, ldap, microsoft-ds, ms-streaming, ms-wbt-server, msnp, nat-stun-port, netbios-dgm, netbios-ns, netbios-ssn, nntp, ntp, openvpn, pop3, pop3s, pptp, radius, radius-acct, rfb, sip, smtp, snmp, snmptrap, ssh, submission, telnet, teredo, tftp, urd, wins).
Effectively to enter a natural port/portrange you have to type the numeric values in manually.
I would think that since the alias is a numeric value it would work here, but you have to select "Single port or range" and then enter the numeric value manually?
Extra:
Other than this, it would appear quite an improvement to move into 27 and now 27.2, also love the fix to the Service status, looks great!!