STRANGE ISSUE... SEEMS TO BE LAG, IS NOT.

Hello,

I've got a problem with my character in game.

Sometimes while I'm playing, my spells won't do damage, my heals won't heal... but I can still chat, move... (in party everyone can't see me move, they just see me stuck in one point) ... but I can navigate, and do everything normally, just without any effect.

I can wait for minutes but nothing happens... I have to relog into the game and this is not funny at all... when it happens during boss fights or similars.

Please help me to understand....