Upgrade 26.7.1 to 26.7.1_1 Alias objects not working in Firewall Rules

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I have a backup firewall which was running 27.6 (and not been internet connected until tonight since the upgrade to 26.7) with the original firewall rules when I update it to 27.6.4_1 this evening the process completed successfully and all the rules with the aliases worked correctly, absolutely no issues.
However I still restored the backup from this morning to both firewalls would be running the same config.