EventSystemManager.currentSystem.IsPointerOverEventSystemObject()

Has something changed with EventSystemManager.currentSystem.IsPointerOverEventSystemObject() recently?
I was using it to block raycasts from going through my UI elements and it was working perfectly before, but now it seems to be blocking all raycasts as if the entire screen was one big UI element.
What I've currently got:

Code (csharp):

1.  
2. if (Physics.Raycast(ray, out hit, 1000))
3.                 {
4.                     Debug.Log(hit.collider);
5.                     mouseDownPoint = hit.point;
6.                     //if we hit terrain
7.                    
8.                         //If we're not hitting the UI
9.                        
10.                             if (!EventSystemManager.currentSystem.IsPointerOverEventSystemObject())
11.                             {
12.                              DoMoreStuff();
13.                             }
14.                  }
15.  

and that blocks it all, not just over the UI elements.

 

Seems more likely you've recently added a UI element that you didn't realize was catching clicks. Try disabling pieces of your UI until the clickthrough behaves as expected. Once you've found the culprit, you can use a Canvas Group component to specify whether a part does or doesn't block clickthoughs.

 

I went to do exactly that, uncommented the offending line, and it all works like it used to. No changes made. Maybe I was hallucinating! Thanks for your help