There are multiple bugs in F2 career still being ignored since the launch.
Most notable:
- Changing anything in the setup during practice will make you start the qualifying session with full fuel load
- Tire allocation for the sprint race is wrong. Allocated tire is usually a harder compound, but in the race default one is a softer one, the same that is later used in the race. That forces you to put used tires in the feature race. AI drivers use the softer tire for the sprint as well, but don't seem to suffer the consequences.
- Not being able to change weekend structure: disable sprint races. There's just no moment in which this option is allowed to be changed
Please, take care of the F2 career. It's fun and immersive to start in F2, but the bugs and overall lack of any ability to customise driver or change many settings make it not worth the time.