Since i got the game I've been leaving it running overnight to see what the simulation gives me. Yesterday I woke up to find the game running at <1 fps, thinking that maybe there's a memory leak or something I (eventually) saved the best specimen and restarted the game but when I loaded it back up and tried to spawn that specimen the game dropped to <1 fps again. This doesn't happen with any of my other saved creatures, only that one. Any idea why that might be happening?