In Loving Memory's (SCH lvl 65 quest) Instance AI Issue
I've browsed the posts to make sure, but I have not seen anybody talk about this.
to recap in this mission you assist Alka Zolka (A Marauder) and a tonberry girl to Amdapor Keep where you attempt to find something for the tonberry girl to remember her father by. The true issue comes into play when you reach the boss of the instance called the Manastealer.
The moment you get into range of the boss, Alka comments on the beast and stops where he is as the boss goes to him. And that's the issue, he stops wherever he is. So if you didn't know to take your time and guide him into the room before hand, you've just bottlenecked yourself into a small hallway and Alka will not move. This has caused me issues 3 times. All three times this has happened, I've found it impossible to complete the mission without harming Alka by accident or without making it impossible to see his health because the beast throws orbs that give vulnerability stacks wherever you are and are placed there after you move.
I can't be the only one this has happened to, and I remember having something similar (yet more minor) happen in another mission but I can't remember which. If this happens to anybody else in another instanced mission, please let me know. I was also tempted to put this in the "bugs" but this seems less like a bug and more like just an AI issue and making sure I'm not the only one this happens to.