"Back" button only works after pressing pause...is this by design?

As I’m building a cue list, often I need to back up one cue to see the change again, but it seems that I can only do this after pressing pause first. Is this a preference that can be changed or is this by design?

This is a few months old, but I believe that the back/pause button pauses the cue if it is still fading to the next cue, then pressing again goes back. If the cue has already faded to the next one, the back button goes back.