Not sure if this is a known bug or not, but I've just tried to start a new Career save for the 0.36 update. I bought my first car, took it to the garage, installed cargo boxes, and went to start some cargo delivery missions to begin to grind some cash. However, when I went to start those missions, my brakes were locked on, and the engine was free-revving as if the car was in neutral or the clutch was engaged. I use realistic shifting method, so the only time the brakes should be on is when I'm pushing the brake pedal.
I tried towing to garage, which didn't fix the issue, and I even reloaded the save. I went to pick up more cargo, and the same bug happened again. This is completely game-breaking, as the cargo missions are the first ones you realistically can do to begin to earn money.