I wanted to wash two standard size pillows on Bedding cycle with Soak option, and when machine starting adding water, pillows become heavier and heavier, and the washer filled almost to the top. Both pillows were floating on top with the drum full of water, and remained motionless during the whole wash and rinse cycles. If I soak pillows (or clothes) in the laundry sink, and then transfer to the washer, it's the same scenario, since the washer doesn't detect the load size but just weight, it fills the drum almost full. "Add water" option was not activated.
So, how is it possible to wash pillows (or clothes) that need soaking without the washer filling up to the brim?