It sounds like the rinse hold button has been pressed
Selecting this option will pause the cycle in the final rinse with the fabric conditioner keeping the laundry fresh until you are ready to complete the programme. The Rinse Hold light will flash to indicate the cycle is paused. The machine will stay in this state, tumbling the load occasionally until either the Start/Cancel buttonis pressed or the Rinse Hold button is pressed again to continue the cycle.
Could that be the problem?