There's a problem with the final boss in tam-tara hard. When adds spawns, I can target all of them, but sometimes it interrupts the casting because when I start to casting something my character turns automatically to the mid of the room instead keep watching to the target add and interrupts the casting.

I was there as BLM, BRD, WHM and PLD... and I haven't this problem with BRD, WHM (cleric stance time!!!) and PLD.