Dark spot appears on screen
A dark spot started to appear on my 12.9 inch 5th generation iPad Pro. See the attached photo. Strangely, it disappears from time to time for a while (under an hour) but it always comes back.
I took it in to the Apple Store and, of course, it had disappeared. They told me that it must be a software problem because it was not permanent.
i reset the iPad to clear everything out but the spot was present when I restarted the iPad.
Two photos are attached. One with the spot and one without. The latter was taken after the former.
Interestingly, the spot does not show up in a screenshot. The attached photos were taken with my iPhone.
any suggestions would be appreciated.