4.2 : Freeze, error 90006 on only 1 of my 2 FF14 service accounts

[Xtah]

Hello there,

I have 2 FF14 service accounts (n°1 & n°2) that I launch one after another on the same laptop, using the same internet connection.
My characters are in Moogle (EU), and so I usually play both characters simultaneously, whether I run a dungeon with n°1, while n°2 is doing some rapid synthesis, or when I gather same nodes with both characters. I've been doing this since ARR without issue.

But since 4.2 patch, I've encountered several issues with my FF14 service account n°1, and only that n°1 (although I'm running both accounts at the same time), such as : lags, freezes, endless freezes and eventually error 90006. As soon as I encounter error 90006, I kind of enter in a error 90006 loop for some time... But when error 90006 stops, I'm having again lags, freeze etc... until the next error 90006 cycle.

I encounter these issues whether I :
- craft
- gather
- change job/class
- interact with certain npc (Ixali vendor, scripts vendors, my retainers)
- interact with certain objects (summoning bell, entry door of my house, quests objectives, company chest)
- teleport

I would like to point out that
> I mainly encounter "small" freezes during crafts, teleports, when interacting with summoning bell, retainers, script vendors, quests objectives and entry door of the house, changing job/class,
> but as soon as I interact with Ixali vendor, i get an endless freeze (without disconnection error 90006)
> and as soon as I approach a gathering node (normal, unspoiled, whether it is crowed or not it doesn't make a difference), without having the time to interact with it, I immediately get a "true" endless freeze and I can just wait for the error 90006 to occur.
> I don't have such issues when I'm running a dungeon or a raid.

Yesterday, I couldn't even open the company chest because of "data unavailable" whereas I could open it with account n°2.

Everytime I encounter a problem with account n°1, I try doing the same thing at the same place with account n°2, and I can do it just fine. For example, just an hour ago, I brought both characters on an unspoiled node : n°1 immediately got stuck in an endless freeze, and n°2 could gather just fine.

And whether I run account n°1 first and n°2 after, or n°2 first and n°1 after, it doesn't make a single difference, only 1 account is having issues and it's only the account n°1.

I really don't understand why.
If someone can help me, please.