I've experienced 90002 errors roughly since Stormblood, but with Shadowbringers out, it's starting to get irritating. Normally, I get kicked to the lobby and can get back in pretty quickly, but at the start of this expansion and considering the high player queues, getting kicked during prime time pretty much means I'm done gaming for the night. I've tried the long list of solutions that are normally posted i.e. adjust the settings in IE, portforwarding, etc. I've also tried VPNs. I've turned off my firewalls on both my router/modem and my computer. I've gotten brand new CAT6 cables. I've basically done everything that I can do to prevent these frequent disconnects. Still, over this period of time, I have noticed some things about the timing of the disconnects.

The biggest observation is that they mostly occur during an instance switch, particularly with duty finder. It's either when I enter a dungeon or exit that I will experience this. Basically, if there's a fade-to-black scene switch, it seems most likely to occur, although it isn't restricted to that. I've had these 90002 happen very randomly, such as talking to an NPC or even flying in a zone.

Thought I'd add my two cents and see if SE and/or the forum community had any suggestions for me. This is a brand new computer, so that sorta rules it out (and the disconnects occurred on my older PC as well.) Thank you all for reading. Happy gaming!