Delay on my CHAR

[Lawyered]

This has been going on for quite some time now, and I have barely been able to play during "prime times" because of my delay of ~1 second, when it's like 10k+ online, but it's only on my char specific, I'll log any other char and I got no delay at all, even on the same account as my main.

Can anyone help me? I really can't figure out what the problem comes from
(It's not my internet/router, I've checked both.)

Any possible solution is welcome, thank you.