I do not know if it's because i recently downloaded the game into my laptop, but recently, I there are lots of people who i cant see. I can see their pets, but not them. I cant shield them nor heal them either. the same thing happened during a boss as well. I could not see the boss, or rather, I could see a wooden dummy in place of the boss, but I could not target him, so I had to use AoE spells to win the fight.
About that, however... Yesterday the loading arrow was stuck. It kept loading a "samurai boot" or a "gentlemen boot" during the entire time I played the game. Mind you, this did not happen the last time I logged in but I thought i should let you know.