I tried it numerous times and it does seem to be fixed. Thanks. The arrow still hits the looter and "pushes" them a bit, but it doesn't stop them from getting their loot (nor does it damage them), so the problem is in fact solved.

Edit - I tested it more extensively (this time having someone shoot me while looting), and I was a bit mistaken. You actually do still take damage (which is why you get pushed back), but it doesn't interrupt the looting. HOWEVER, I just so happened to be looting in the water spot in The Zone, right near the edge, and someone attacked me with their sword and I missed out on my loot. Granted, it's not too often that a loot circle spawns in a spot where someone can hit you with their sword, it's still another bug.