it has been occuring for more than an year that buffs (mostly important ones such as celestial type ones and debuff immunity) are not being applied at the exact moment they are felt. the time gap for the buff to be truly felt can go from 1 second to a full 3 seconds. a clear example: http://i.imgur.com/frophkp.jpg as you see i use unbind and i am immune to any debuff, however shadow chase (a debuff that stuns ur oponent) still landed on me. another example: http://i.imgur.com/in6qgcf.jpg it is clear that i am invincibile as i used summon barrier, however the oponent still could land a power bomber (debuff for knockdown) and do damage aswell. a thread of bigger discussion was made here so you can check more examples and experiences from other players: https://4gameforum.com/showthread.php?t=20413 on a pvp-driven game, it is of the most importance for such issue to be fixed. timing is everything on pvp games and the game has grown to be so fast paced, issues like this will determine the pvp and not the skill of player. i ask that the main developers have a trhought check and testing and fix one of the most critical bugs in l2.