I'm going to need a lot more info from you because that is a bug that I thought was squashed, so to try and track it down now I need to know precisely what you were doing: What mode you were in, how many exoskeletons were equipped, what your settings were set to, and anything else you can think of that you were doing just before it crashed, like did it crash when you tried to run? When you stopped? When you ran, stopped, ran again? Was it when you changed mode? If so, what mode were you in before you switched? That sort of stuff. And if you can upload your save file to dropbox or something for me that could help as well.
Edit: oh and are you fully up to date? That's very important. What version are you on? (You can see in the mod menu in-game)
