If the robot does not position correctly during washing it could be due to a number of reasons:
Lost positions will show when robot parks incorrectly between washing programs or when it does not wash where it should. Read more about possible explanations for incorrect positioning here.
If the homing is lost the robot will show an alarm (Homing needed) when trying to start an automatic wash. It will also show as red circles on the detailed manual screen. If your EVO Cleaner needs a new homing, see this Homing instruction.
Lost homing can also mean lost parking positions, which will show when robot parks incorrectly between washing programs.
The clock is seen in the top right corner on the start screen. Date is seen on the Settings screen. A lost clock sets the date and time to 1996-01-01 00:00.