I have a portable Kenmore dishwasher. It works great but I have had a weird problem lately. We run through a cycle and it completes normally. We unload and reload and turn on again and it thinks it didn't complete last cycle. We cancel cycle it drains a very small amount of water like 1 cup then says complete and we can run it normally. It still works great just this weird issue. Any insight in to this would be helpful.