Aliases not working as expected

[RobLatour]

I have a program (which I wrote) that basically casts sound/video files to chromecast devices.

I also have aliases and firewall rules set up in OPNSense as follows:

https://ibb.co/tsMxV2w

Thing is, if I enable the rule with the aliases and disable the rule right below it, the casting does not work. 

However, if I enable the rule below the one with the aliases the casting does work.

Am I missing something, or should I open this up as a bug with OPNSense?

[RobLatour]

Not having heard back from this forum, I've opened an issue on Githu

https://github.com/opnsense/core/issues/6678

[Seimus]

What kind of Alias group you are using?

Regards,
S.