Ring Doorbell does not record motion when iPhone is off or in Airplane mode

My Ring Doorbell does not record motion when my iPhone is off or in Airplane mode. I use my iPhone to record videos for work. I generally put it in airplane mode so that my videos are not cutoff if a call comes through. I have noticed that each time I put my phone in airplane mode, Ring does not capture ANY motion or video during this time. There is a lot of motion (cars, people, etc) on my street during these times so I know it should capture something.