I did wonder about the engine off thing.
It's hard to explain, but if you put your foot on brake pedal and put a steady not to hard pressure on it, the pedal goes down over half way until it stops. It feels exactly like you have a bleed nipple opened a small amount.

To be honest it has same feeling as if air was in system but we have bled the brakes very very thouruoghly , it's not like we are novices, I have renewed brakes on my scoob a few times with no problems.