That's the status of obstacle avoidance in each direction. Red means it's not activated, too dark to work, or not in the air yet. White means on and working.
Ok, thanks for the explanation. I didn't recall ever seeing it red before and at the time I was flying over water, so I thought maybe that was it. But I also used sport mode briefly to get where I wanted it to be quicker.
That symbol you see right next to RC signal strength is your omnidirectional obstacle avoidance indicator, with red meaning given fisheye camera (front, top, bottom, back, left and right) is unavailable and with your picture above meaning none of them are. This is completely normal if your drone is not in flight, or sport mode is turned on. Hope this helps