Despite saying this issue was resolved in 5.4.2, I'm unable to register input across displays. I currently have 3 displays in one scene, with UI elements being rendered in camera space for each display. The UI Event system is only registering on one display. Switching to the other two displays in the game tab does not effect the UI Event System. For example, the Event System registers a button click on Display 2. When I switch the game tab to Display 3, the Event System still registers all clicks for Display 2. Any help/ work arounds would be greatly appreciated. EDIT: This users issue describes my problem exactly, if this helps illustrate the bug in question: http://answers.unity3d.com/questions/1111243/53-multiple-display-canvases.html EDIT 2: Changing the Canvas to screen space and specifying which display to render on does not resolve the issue. Changing the Canvas sorting layer to be the highest value sets that particular canvas to be "active" allowing for interaction.