Hello.

  printf '%s\n' "+::ffff:80.187.103.83" > /proc/net/xt_recent/alien_super

results in

  < /proc/net/xt_recent/alien_super awk '{print $1}'
  src=0000:0000:0000:0000:0000:ffff:50bb:6755

But the actual IPv4 address is not actually blocked from the firewall that does

        add_rule -m recent --name alien_super --rcheck \
                -m recent --name alien_super --update --seconds 84000 --reap -j DROP

(where "add_rule" is a sh(1)ell function that does the expected).
This happens on both AlpineLinux edge with virtual kernel as well as with self-compiled

  Linux kent 6.1.97-ideapad #1 SMP PREEMPT_DYNAMIC Sat Jul  6 21:43:14 CEST 2024 x86_64 GNU/Linux