As someone said above, check the leak tray. There’s usually a plastic tray across the whole base of the dishwasher, with a float switch on it. If water gets into that try, and the float switch triggers, it thinks “hey, I’m leaking”, will not fill any more, and will possibly run the drain pump.
See if there’s any water in the tray. On mine (different model), you can look in the front if you remove the trim panel.