Attached a video demonstrating the symptom, and pictures of the setup. Video starts just before the Drain Cycle ends. Once it ends, air slowly enters from the disposal-end, pushing all the water from the top of the high loop back down into the dishwasher. It rests near the bottom, where the water level ends up inside the dishwasher. Shouldn't this not happen?
Best Answer
so some of the waste water from the dishwasher returns to the dishwasher when it finished pumping that's completely normal. There's no real way to prevent that.
So long as you don't get water from the sink or from the drain flowing into the dishwasher everything is fine.