Scenario - Next Day Delivery No problems until you stop at Wurzberg sidings and are given a red aspect signal with white freight aspects as well. Contacting the signaller tells you to proceed as the signals indicate which, if these signals are correct would mean accelerating with the brakes fully applied? This is the same throughout pretty much all freight scenarios and journeys on all routes and you have to pass the signal and get stopped in order to proceed.
In this case, the white lights allow you to pass the signal at danger with caution. The brakes apply because of PZB thinking you have passed a signal at danger unauthorised. You have to press "PZB Override" which is next to "PZB Release" Which is next to "PZB Acknowledge" to let PZB know that you are allowed to pass the signal at danger. I haven't actually tried pressing the button, but I believe that is what you should do.
Sods law that now I have said that, I can't find a freight route with those specific signal aspects... I shall endeavour to continue my search To be continued
As aeronautic has said you have to press, and keep pressing, the PZB Override switch as you pass the magnet and for a good few seconds after. Button binding is hold square and left d-pad.