Error 90002 every time I step into the last boss room in any dungeon

Hello, I started playing again a couple of weeks ago and I've had a problem I have noticed to be consistent - every time I step foot into the last, boss room of any dungeon, about 10 seconds later I will get the error 90002 and get disconnected. It happens on any character in any dungeon. It doesn't happen in trials that I have seen. I tried reinstalling my game and restarting my router several times, nothing has helped. Any ideas on how to fix this? It seems way too specific to be some general problem with my internet, everything else works fine and I don't have connection issues anywhere else it seems nor in any other game period. It's just when I step into the last room in a FFXIV dungeon that it happens.