Why does the dishwasher fill and drain multiple times on cycle start?

Hello - This is model DUL200PKS1. Every thing is working fine with out any diagnostic lights, except for the unit filling and draining multiple times at the start of the cycle. Heating element works fine. It does complete the cycle, it just wastes heated water at the start of the cycle. I’ve checked the float switch and works fine. I don’t really want to swap parts without a good diagnosis, and would prefer to not buy new if it is repairable! Thank you.