When it starts, the water comes in in measured amounts, then starts flooding the tub edge.Then faults out with the 'Heavy" and "Quick" lights flashing

Model DMT300RFS/XAA
When it starts, the water comes in in measured amounts, but in a few minutes is to the point of flooding the tub edge. The unit then faults out with the ‘Heavy” and “Quick” lights flashing. This shows to be a ‘flow meter error”. Can someone who is familiar with these units expain the fill cycle on this model? I was able to vacuum out the water and then the unit would go into diagnostics. The wash motor and drain motors work fine from the service cycle, but nce the unit overfills, the control is useless. They should have made this unit go directly into a pump-out instead of freezing up full of water, in my opinion.
Any advice on how to solve the overfill issue? It’s not the valve…