In Zul’Drak, after completing “Infiltrating Voltarus” and while attempting to complete “So Far, So Bad”, orange combat text would start floating over enemies in the area that I hadn’t attacked. In some cases the enemy would simply return to full health after being hit, but in most they eventually aggro’d onto me. This started as soon as I came back down from the necropolis, and logging for a few minutes did not do anything.
EDIT: Should be noted that I’m an elemental shaman, and haven’t used elemental totems in well over an hour, so there’s no chance that it’s an actual pet or guardian glitching out.