After migration from v17.8 to v18 EAP 1, for each firewall rule where the source service is differnet but the outsource IP is the same, NAT rules are created for each firewall rule.

NAT rules use Orig SRC, Orig DST, Orig SVC and Inbound and Outbound interface - these criteria then are translated according to Translated SRC, DST and SVC.
If you want to create a rule which translates any service then use ANY as the Orig SVC and Original as the translated SVC

NAT rules use Orig SRC, Orig DST, Orig SVC and Inbound and Outbound interface - these criteria then are translated according to Translated SRC, DST and SVC.
If you want to create a rule which translates any service then use ANY as the Orig SVC and Original as the translated SVC

Thanks Stuart for your comment.

Mine was an observation. In previous XG version, if people have 50 firewall rules, where for each firewall rule, what changes is just the service port number, the translation mechanism will not look for similarity, but 50 NAT rules will be created. I think you can rethink about the migration process. A single NAT where any any as source, and service can work in this situation.