Hello,
OMSI 2 sometimes doesn't allow me to use the Shift+Y (Or Shift+Z if you use Deutsch keyboard layout)
I've noticed this tends to happen when I'm impatient on the bus menu, and end up clicking until OMSI 2 is 'not responding' or possibly on the map loading too. After doing that OMSI 2 shows a black screen whilst I'm on the bus menu, and typing in the registration area is really laggy.
Here's what I mean: