Logs show ::ffff instead of client IP when listening on IPv6 (--host "::")

[JuliaLblnd]

After upgrading NetBox to 4.5.x, I noticed that the access logs inside the netbox container no longer show the actual client IP address.
Instead of a valid IPv4 or IPv6 address, the log entries look like this:

netbox-1  | [2026-02-09 19:40:47 +0000] : - "GET /login/ HTTP/1.1" 200 4.161
netbox-1  | [2026-02-09 19:41:24 +0000] ::ffff - "GET /dcim/sites/ HTTP/1.1" 200 2419.641

Only the : or ::ffff prefix appears, without the actual client IP.

After changing the Granian --host argument from:

--host "::"

to:

--host "0.0.0.0"

the correct client IPs started appearing again in the logs.

I later found the GRANIAN_EXTRA_ARGS environment variable (and the related discussion #1614), which makes it possible to override the default host like this:

GRANIAN_EXTRA_ARGS="--host=0.0.0.0"

Would it make sense to allow overriding the default --host "::" via a dedicated environment variable (e.g. NETBOX_GRANIAN_HOST), or at least document this workaround?
It might help others who run into the same logging issue.

Would anyone happen to know if there is another way to get correct client IPs in Granian’s access logs without changing the --host argument?
If there is a recommended configuration or a Granian option I may have missed, I’d be very interested.