Having a small amount of water in the bottom of a dishwasher after a cycle is typically normal and not dangerous. Dishwashers are designed to have a small reservoir of water at the bottom to aid in various functions, such as filtering debris, preventing the drying out of seals and gaskets, and ensuring proper operation of the drain system.
However, if you consistently notice a significant amount of standing water in the dishwasher after each cycle or if the water doesn't drain properly, it could indicate a problem with the appliance. Some potential issues that could lead to excessive water in the dishwasher include clogged filters, drain hose blockages, malfunctioning pumps, or problems with the drain valve.
If you encounter persistent issues with water not draining from the dishwasher or if you have concerns about safety, it is advisable to contact a professional appliance repair technician or the manufacturer's customer service for assistance. They can diagnose and address any problems with the dishwasher to ensure its proper functioning and safety.