According to Motherboard, the latest iOS update is killing the touch functionality of iPhone 8 handsets that have had their original display replaced with a third-party part.
The screen will display the iOS home screen, but is unresponsive to touch input.
Third-party repair shops are up in arms about this move.
"This has caused my company over 2,000 reshipments," Aakshay Kripalani, chief executive of repair shop Injured Gadgets told Motherboard. "Customers are annoyed and it seems like Apple is doing this to prevent customers from doing third-party repair."
In the meantime, if you suspect that your iPhone 6 has had its display replaced by anyone other than Apple (or an Apple authorized repairer), then I recommend holding off installing iOS 11.3 until Apple has a chance to comment and fix the issue.
iOS 11.3: Tips, tricks, and how to fix the biggest annoyances