I'm not sure why, but this happens with not only the mantis race, but also other race mods (sergal) on the mod forum *though not all!* where I make the character, then when I go to play, starbound freezes up and gives me a "client-server connection is no longer valid!" Error. Something similar occurs when doing multiplayer. I've tried googling the error but haven't really found a reason why. This occurs even with the new update as well.