@Fae Thank you for the link, I applied that beta to my AP last night and it looks like all the IPv6 tests I run are working again with VLAN enabled! I'll keep using the beta firmware and I look...

For anyone that is looking for the same solution, I contacted the TP-Link support and they said they are already aware of the issue and are working on a beta soon.

@GPB Thank you, I submitted an email/ticket. I also linked this thread. I can't tell if it's a firmware issue, I'm not sure why enabling VLANs would cause IPv6 UDP traffic to drop.

I am experiencing an issue with my EAP670 where IPv6 UDP traffic is being dropped when using 3 SSIDs with their own VLANs. I have tested both the latest stable firmware version and the beta firmware...