Leakage of water through case brake into dishwasher. High loop installation without garbage disposal. Poured food coloring in sink and had it leak into dishwasher at inlet, not up through drain. Is there some type of check valve failure that would cause this?
Turns out Samsung dishwasher has a case break on side of dishwasher where drain water routes through. In case of drain blockage or whatever it is by design that water would then reroute in this case break and reenter dishwasher through inlet on side of dishwasher wall. Though I had a high loop coming off of my piping, it was on a lateral pipe between dual bowl sink. I had to attach DW drain to one of the sink drains, followed by p trap. Water is now "not" backing up and filling entire drain hose that was causing pressure rerouting into dishwasher.