Disabled Panels appear to intercept user input

It appears as though the active state of an object does not affect it's ability to capture input.

When a stack of panels is ordered on top of another user input is caught by the "front" panel. But when this panel is disabled the input is still being intercepted by the front panel.

This is a problem I have only discovered in the latest version of Unity 5.2.0b3.

For example, in the following hierarchy, input is caught by the Panel (GUI EJ200) object, even though it is not active:



However, when the Panel (GUI Targets) is brought in front of the rest, input is caught as expected:



[EDIT] I have just tested this in Unity 5.0.0f3 and the input is NOT caught by innactive panels.