The solution is replacing the washer/dryer cycle selector. When one of them starts going bad it will make a beeping noise without user input. Usually you can figure out which one is going bad because certain cycles will work normally and others won’t finish and can stop at different stages during the cycle. The other easy method I found to figure out which one is the culprit is to listen to the beep that the washer/dryer is making and then physically turn the knob your self without starting a cycle and see if the sound matches. The washer and dryer both make slightly different beeps when a cycle is being selected.