I've seen this happen with all figures and all parts. A brief workaround is to find the stuck part and change one of it's transform settings, and it will snap back into place, and any children that got warped.

But this isn't a fix, so the next time you move the figure you'll get the same effect. Best to just save the figure to the library, delete it from the scene, close up and reopen, reloading the char from the library.