Loopback interface is gone in NAT

[realizelol]

Important notices

• I have read the contributing guide lines at https://github.com/opnsense/core/blob/master/CONTRIBUTING.md
• I am convinced that my issue is new after having checked both open and closed issues at https://github.com/opnsense/core/issues?q=is%3Aissue

Describe the bug

I don't know exactly when this comes to this bahavior but in 25.1.1 there no more Loopback interface in (D-)NAT [Port Forward].
I was redirecting my OPNsense DNS traffic to unbound which is running on a different port than 53.

Loopback interface + Source "Loopback net" + Destination 127.0.0.1:53 + Redirect 127.0.0.1:12345.

To Reproduce

Steps to reproduce the behavior:

1. Create a new rule in Firewall > NAT > Port Forward
2. Check interfaces drop-down list.

Expected behavior

Loopback interface is there to select. Also NAT should be working.
(In previously created rule Loopback interface is still be shown but out of function)

I think in 24.7.5 it was running fine, expect IPv6:
#7943

Maybe this has something to do with #8008 ?
I'm using the default setting never.

Environment

Software version used and hardware type if relevant, e.g.:

OPNsense 25.1.1 (amd64) on libvirt/qemu
Intel® Core™ i9 14900 PT
Network Intel® virt