I am getting similar errors on a couple of sites with IPv6. It seems to be dropping the last chunk of digits from the address.
Wordfence can't get the IP of clients and therefore can't operate. We received IP: 2001:470:8166:a01:c5cf:bccb:579c. X-Forwarded-For was: REMOTE_ADDR was: 2001:470:8166:a01:c5cf:bccb:579c:1063
Is there a solution for this? I would like to be able to use this plugin on these sites.