90002/90006 errors

Date and time: I think it started around 20th September, and has occurred every day I log in since. Can happen anytime; AM, PM, evening.

Frequency: Constantly. Can happen either once during a session or up to 6/7 times before I get fed up and log out. It can either be every 10 minutes or I can go a few hours before I get an error, and after that it’s back to every 10/15 minutes.

World name: Phoenix

Class/Level: 70 SMN

Party or solo: Both

In-game time: Any

Housing: Mist. FC House.

Steps:
1. Occurs directly after logging in. Extreme lag. 90002.
2. Occurs whilst in party and in dungeons. Usually no lag and happens without warning. 90006.
3. Occurs whilst interacting with NPC. 90002/90006.
4. Occurs whilst moving/gathering/crafting. 90002/90006/10105.
5. Occurs when trying to log out and exit the game. 90002/90006.

Connection specs:
Type of internet connection/provider.
- Virgin Media. Super Hub 2.0. Modem. This sits downstairs.
- I connect a Netgear Powerline PLW1000 to the Super Hub via an Ethernet cable. I then connect my PC upstairs to the Netgear Powerline PLW1000 in my bedroom via an Ethernet cable.
- I’ve recently upgraded from a Netgear Powerline 200 and had a few connectivity issues with that too, but they seemed to resolve themselves after a week or so. Error codes were always 90002.

Modem maker/model number.
Virgin Media Super Hub 2ac. VMDG590

I've tested other games such as WoW and GW2 on my PC and my Laptop using the same connection and there were no issues whatsoever with lag and disconnections. It only happens with FFXIV. Any tips/advice/solutions will be gratefully received! I'm so excited for 4.1 but at the moment the game isn't playable for me.

Thanks in advance!

Lolzy xx

Started today for me. My latency is 30 and never goes above 40 no lag spike or any warnings and then get 90002 error. Then can't login again until I exit completely out of the game then login again.

Same issue here for about a month now as well on Tonberry. Some days there's no problem at all. Other days I login and get one of these errors 5 times in less than 30 minutes. Some days it's bad enough that anything instanced is unplayable.
All while this is going on, I'm pinging the server in the background, watching my WiFi connection monitor, or streaming music and everywhere aside from FFXIV experiences absolutely no issues. Really hope there is a fix soon.