If you did not target yourself manually before hitting Sci Team it would sometimes jump to another target on your screen as far back as I can remember. No change there, just had to either make sure nothing else was visible on camera or target yourself first.
True but currently even if you target yourself or if you target nothing and use ST (or any other skill) it frequently jumps to another target. (I think SS1 is the exception to this rule but I'm not sure). So you can't clear it and if you don't your target will change frequently. You basically shut down any healing and no matter how careful you are you will hit your friends often.