DeLonghi Bean-to-cup coffee machine (DA1)

De Longhi bean-to-cup coffee machine. Can either grind whole beans or use ground coffee. It works perfectly for making espresso and regular black coffee drinks but there is an intermittent problem with the milk drinks as it sometimes doesn't register that the milk canister is present. Usually, the first Latte or Cappuccino comes out fine, but the second one is when the problem might occur. Sometimes you can rectify this by removing and replacing the canister, but when this doesn't work it generally fixes itself after being powered off for 15 minutes. Instruction booklet and spare water filters also included with the machine.