Ice shot hitting targets way off screen

So, I am currently lvling a Ranger, using Ice Shot. Having fun so far, but I noticed this weird thing where sometimes there would be items lying around in an area I had yet to explore.

I then began to notice it even more, sometimes mobs would come running at me with 1/10th of their health and full ES, but I hadn't been anywhere near them yet. I pretty much got confirmation on this a while ago, I had just entered act 2, and was killing monkeys, when I was running forward and saw a lvl 1 Clarity gem on the ground (probably about 1-2 screens away from the last monkey I shot), I had not shot anything in this area, and hadn't explored it yet, so where else could it come from?

I'm sure the AoE of Ice Shot is not intended to be like this, and wanted GGG to be aware of this.