This wasn’t annoying. In fact, we found it quite hilarious, but I’m betting it’s not working as intended.
I pulled a snake with Frostbolt 2. I typically will back up while it travels to the mob, so I can potentially get a couple more spells off before it reaches me. In this case, I backed up the side of a hill (south desert, just outside graveyard side of town, near the arched rocks). As the snake moved toward me, my friend says, “It’s flying!” Apparently the mob chose a “straight” path to reach me, and since I was 20 feet or so up the side of the hill, the mob left the ground and headed straight for me in flight.