Technical Instant disconnects

[Hauzikon]

I have one character that causes me to log out of the client after loading into the char. (back to the Account name/ Password screen)
All other chars on this account are fine.
I opened a ticket and got the reply this had been taken care of.
But still the same issue. I then used the "unstuck" feature on the HP. Same issue (but now in Dalaran instead of my old position.)
Now I´m wondering if deleting the WTF folder can be helpful.
... and off course if this is a known issue with a known troubleshooting?

[Hauzikon]

The cause was found. I disabled all addons and now I can log in.