I notice in circumstances when you have a lot going on around you, certain things make the game lag sort of, like the away teams radioing that they are going for ore at certain coordinates sometimes it will say the message with a (x250) next to it, this and every step it does this so it takes me like 5 minutes to walk back to my ship, in another circumstance i found replicating worms on an abandoned spaceship and each turn i took it said that the sight of another dead worm angered it with another (x400)
i don't know if this is a bug or meant to be but its very annoying