"Cannot see your target" when spell goes off in cities (PvP) .. ?

[mischief419]

So I'm a bit confused, and asked this in ooc the other day. I'm told that for pvp, spells will land as long as you're in range and had sight when you STARTED casting. Well, that's never been the case for me. Every time I've ever casted on someone, they sidestep around the corner and it will never land, even if they're inches away.

Others seem to be able to happily cast on me the same way but it lands! Is there something I'm not getting? Someone will start casting, I'll remember I can step around the corner and it won't land... so i stepped around, and boom, spell hits. Ever since then, I noticed spells hit ME around corners in pvp, but i can't hit OTHERS around corners.

Is there a trick to this ? O__o