Why has my washing machine suddenly stopped working mid-cycle with a tub full of water?

There could be several reasons why your washing machine has suddenly stopped working mid-cycle with a tub full of water. Some common causes include a malfunctioning lid switch, a clogged drain hose, a faulty water inlet valve, or a problem with the motor or control board. It is recommended to check these components and consult a professional if needed for further diagnosis and repair.