Improve nautilus pathfinding so they don't boost and kill themselves

I got a coral zombie nautilus, I put it in a tight spot temporarily, and then I got the message that it suffocated inside a wall out of nowhere. I know they periodically boost, so I'm pretty sure that was it because I get stuck inside a wall every time I try to boost on one. If you're going to add a cool mob with rare variants, don't make them kill themselves out of nowhere.