Apple suppliers are “scrambling” to complete screens for the iPhone 6 after a component redesign caused a production setback, Reuters reports. A backlight had to be redesigned after Apple’s initial attempt at including a single layer of backlight film — as opposed to the typical two layers of film — was deemed to not be bright enough. According to the report, the backlight had to be redesigned with the extra layer. Suppliers are working to make up for the lost time, and it’s unclear if the delay could limit the supply of iPhone 6 units at launch, sources said. Last-minute changes to the thickness of a large component such as the screen might explain the need for other thick components, such as a camera module, to protrude. Apple declined comment.