Now in 2022. Same thing happened here, with a D3122 (D20.1). They called a repairman trained to Asko, who wanted them to change the control board. $$$ Can't believe that he did not know the issue with the flow meter, after all these years on the market.
I found the reprogramming procedure to time-fill in the service manual, and everything worked fine afterwards.
My feeling is that the meter-fill mode is present in order to meet eco standards like Energy Star. The meter is a sort of plastic turbine with a magnet and a reed relay. Either it stops turning because of dirt, or because of wear. Going to time-fill avoids the replacement of a quite expensive valve-meter combo, and it shows that the rest of the (a pretty nice) dishwasher works correctly.