iPhone 7 Plus display issue

Hi - I had just started a DroneDeploy capture (Phantom 4 Pro with latest firmware & iPhone 7 Plus on latest iOS) and I tried to move the map but the display corrupted and I couldn’t do anything at all with DroneDeploy. The drone looked fine so I left it alone and the drone landed safely when the mission ended.

However I’d like to share with you what the screen looked like when this happened.