This happens on the PTS and Live (has been since launch). But I caught it while doing Cradle of Shadows, so I figured I'd post it in the PTS forum.
During combat with actual enemies sometimes ambient non aggro creatures get targeted. It happened here with both my purifying light and my puncturing sweeps. The sweeps were even worse because I was facing the actual enemy and it turned me.
Can something be done where either you can't target ambient creatures with non light/heavy attacks, or at least during combat they aren't targeted over enemies.
https://youtu.be/iCY5h4hmk4I