My contactless chip reader and my android phone. When I would tap the blue dollar amount to enter a cash payment for square to record, an error message would popup saying to insert a chip card. Since you tap the blue dollar amount, to either record cash, or prepare the reader to take apple pay or a tap card, or to enter a card manually, I couldn't do any of those things for 4 busy hours yesterday. After repeatedly disconnecting, reloading square, and repeatedly restarting my phone and turning it on and off, the feature appears to be working now. One other thing that my chip reader was doing during this time was that the 4 green lights were staying on solid, and not turning off.
