This is mentioned on the front page and has been reported before. It's technically not fixable in the current mod, but I have since learned of a way to make it work. (See Cerys, which does it well.) It's a pretty large rewrite though, so I'm not sure when I'll have time to change it.
In the meantime, you can disable parallax, or just ensure only one person is viewing a given space surface at a time. It's not server-side, it just only works for one person viewing the surface. (Let me know if this isn't the case anymore ofc.)
Edit: I've actually just thought of a good way to fix this without a massive rewrite. If it works, it should be fixed by sometime this week.