Never had this problem before today, or at least never noticed it before today. While just sort of camping out a spot today (in fact doing it while posting) I noticed that since I am invising myself and allowing the evs to do all the work, when ever I cast EV while invised soon as the spell is done casting (and with out queuing a target yet) The system tells me "Target cannot be seen" in fact I do not even get the target cursor. If I repeat the spell, with hitting my last target key (queuing the target) it will cast just fine (since I am not invised I guess?) And even trying to Que the target from invis it will not. Another thing I just noticed while testing a bit of this, I do not receive a system message saying that my target has been queued if i use last target, but target self gives the message.