New alias not functional

[Shad]

OPNSense version : 25.1.10
Architecture : amd64

I'm trying to add a new alias for an IPv4 host, like many others I already use in NAT and rules.
For some reason, the alias is not functional.

Once the rule is set, the loaded columns remains to "0" in the alias table.
Current table entries are at 535.681/1.000.000

If I use another alias to redirect to, it works.
If I directly use the IPv4, it works as well.
I also created a new dynamic IPv6 host alias for the same machine "oraka", it does not work either (loaded "0").

Any ideas ?
Thanks a lot for your input.

(I'd rather not going for a system update right now, I'll try to reboot this evening if I'm still stuck)