Pressing 'Update Body' in the 'Modify Body' tab in System View in a Real Stars start in Sol always resets the bearing of Mercury, Venus and Luna to zero. It's very easy to reproduce, but mysteriously doesn't appear to affect any of the other bodies. In all other cases, the Hydrosphere is updated from 'None' to 'Ice Sheet' or 'Liquid', even when there's no water at all. It also looks like the body parameters (mass, orbit time, temperature, etc.) are adjusted slightly on the first click. I have no idea what's going on here.