Constant error 90k related to location?

Hi everyone,
after an unusual grace period, yesterday evening I logged in Mor Dhona and got constantly kikked out with error 90k. Everytime I logged I had a data transfer for about 3-5 seconds, than everything freezed (received bytes=0) and got disconnected after about 20 seconds. This for about 10 times in 1 hour of trying.
Than I tried to:
1- Connect to a Japan Data center (Ifrit server)
2- Connect to a different World (Cerberus) on my usual Data Center
3- Even log in with a different Char on my server (Moogle) located in Gridania

... and in all these attempts everything worked fine!!!! Even on Ifrit I had no lag at all!!
I tried again to log in with my main in Mor Dhona, and got disconnected.....
After this I managed to log in and quickly teleport to Nothern Thanalan: got disconnected with a bit of lag, than relogged and everything was perfect!!!!

So... can this be related to Mor Dhona and its huge amount of players within? Does it make sense? The server should be the same.....

Any opinion is most welcome

What you call server is a world. Each world is made of multiple servers. So, yes, Mor Dhona may have too many people.