I found a gamebreaking bug on the [IR] Krakow - Olkusz Scenario.
After shunting and arriving to platform 2 in Krakow, the break check started. But I was late and got the ready message from the conductor during the break check. So the break check didn´t continue and I was stuck in front of the red platform signal. No way to continue.
[EDIT] I did open the doors, before starting the break check. Maybe this caused this probelm.
All scenarios that are checked off in the picture above, did work fine for me, even with trains, that are not suggested by default.