Reply to Cue mix at middle, cued track a LOT louder.. bug?

Hey

I really love my S4 but there's one thing that makes it extremely difficult to create smooth mixes:

when having the cue-mix knob in the middle (50% cue, 50% master), pushing the cue button on the new track plays the track A LOT louder than what's going on on the master (for tracks that *are* the same volume).

That makes EQ and gain adjustments for a really smooth mix practically impossible. My HW mixer really plays 50/50 when having cue mix in the middle, so is this a (known) bug? Or any way to fix that?

All help appreciated