The Disable Input node disables all input–mouse clicks, movement (yaw, pitch, roll), and keyboard keys. So, you may be transferring control, at some point, to your widget inputs, I guess…
Below, I have a rough stat menu, which freezes the world but allows for mouse movement and clicks for the application of skill points. The Disable Input node has no impact in this case because of the Set Input Mode Game and UI node.
This may be what you’re doing. If so; I don’t know if this is the best approach, but you could add a simple Boolean to tell the camera/character movement component/etc. when not to work.