IPv6 Remote Access Problems

Server Version#: 1.43.4.10903
Player Version#: 4.160.0, 2026.18.0 (971050439)
Im having trouble getting remote access to work using IPv6 (my provider uses CGNAT). Configured all the obvious stuff, setup exclusions on the machine/ router etc. So far the only thing that works is using my temporary (edit: works with both normal and temp) ipv6 address as a custom url (worked in both app and browser afterwards). Im a complete novice when it comes to networking protocols so not really sure where to begin tooubleshooting. Thanks in advance!