Apple repaired sleep/wake button, why is the display now washed out?
I sent in my iPhone 5 for the "iPhone 5 Sleep/Wake Button Replacement Program". Now the display appears washed out intermittently. The washout appears generally in the center of the display to about 5 mm of the edge. This photo shows what it looks like for a minute or so after heavy GPU usage (scrolling through photos), then display will return to normal. There is no external indication of water damage, the ports don't indicate a pink indicator. (If it is water damage, it happened during the repair on the inside, I find this unlikely.)
I have restarted it, reset it, and restored the iPhone from backup. The problem purely seems hardware related. I did note that they replaced the battery and the camera when they replaced the coax flex cable for the Sleep/Wake button. I thought it may be the battery pressing on the display, but the problem is very intermittent and doesn't seem to be related to heat or charging state.
I know the correct thing to do is to return the iPhone for repair during it's 90-day repair warranty, however they won't give me a loaner phone for this repair. It's ironic that Apple provided me a loaner phone for the "Replacement Program" but won't for a problem caused by the "Replacement Program"
I have replaced many iPhone displays for other people, I have not seen this issue before and it doesn't appear to be related to the temporary white screen common with iPod screen replacements. Opening the phone myself would void the 90-day warranty and replacing the display likely will not resolve the issue.
I'm hoping that others have had this specific issue and have a simple fix I overlooked. I have had no luck finding any other instances of this through a cursory Google search.