Android : parse.com java.lang.ClassCastException: java.util.HashMap cannot be cast to org.json.JSONObject

My code generally works except sometimes it crashes with the above error. It happens on this line of code...

JSONObject profile = (JSONObject) currentUser.get("profile");

It happens only sometimes when I hit the back button. Which makes it awfully hard for me to understand what is causing the problem. Why would it be a hashmap?

Can anyone point me in the right direction?

 ParseUser currentUser = ParseUser.getCurrentUser();

 if (currentUser.has("profile")) {
            JSONObject profile = (JSONObject) currentUser.get("profile");
 }