Hi,
Yes. Make sure you get the latest PlayMaker ( 1.8.3 at the time of post) and check again.
the if you are editing a prefab and in instance if in the scene, open an empty scene and then edit the prefab, it usually fixes this issue.
the other issue if that you may have other non PlayMaker assets conflicting, it happened to other members. We can't do much about this then sadly, tell us which assets you have, we may be able to contact developers to see if we can resolve conflicts.
Bye,
Jean