Dishwasher not draining water
The drain valve could be sticking. There is usually a solenoid that opens the drain valve at the end of the cycle and the water is pumped out instead of circulating.

If the solenoid or the valve is malfunctioning then water could be left after the cycle or the dishwasher doesn't fill as far as it should.

Experiment some more but it sounds like a repair is in your future.

Good luck!