The ContiPressureCheck is working correctly. The pressure is low, which is the reason for the warning message. While driving, the tyre warms up and the tyre pressure increases. The increase may be enough to reset the warning automatically.
Corrective action: Set the tyre to the recommended pressure when the tyre is “cold”, i.e. the state in which the tyre is in after having stood outdoors for several hours, not exposed to intense sunlight.