My iPad air 3 was developing it for a long time. It wasnt visible at all at the beggining but i knew something was there. Now its more visible after about 10 months. Its above home button. Im greatly disappointed that its still a problem in air 3, this was only reason why i bought it instead pro 10.5. Now i think i will sell it and wait for pro 11 to get cheaper. Also bright spot seems to be a little lower than in pro 10.5. I attach also pic of pro 10.5 from local store.