Constant 90002 error since SB Launch

I play on Goblin - Aether and I have been having recurring 90002 issues since Stormblood launch, and -only- since Stormblood launch. At first I attributed it to server stress from launch, then the DDoS issues, but now 2 months after SB launch i'm running out of excuses.

My 90002 issues are now almost exclusively happening during any kind of Duty Finder dungeon/trial/raid and will happen about every 1-7 minutes. It used to be only during "daylight" hours for me (PST, GMT-8) and I could play after midnight just fine, but this isn't true anymore lately.

I have tried: reinstalling the game, checking ports, checking firewall, running as admin, closing other programs, rebooting router.

From which location do you playing?

Playing from Southern California. Sorry my response took a while, went on vacation over the weekend. I also recently tried a vpn since a FC mate suggested it, but it didn't work.