Just had my iPhone 6 screen replaced at the genius bar (just the screen not the display), and I notice that the upper half of the screen is now yellow-ish. Genius bar told me it was glue that's not yet cured because they had just replaced the screen 40 min ago and that it will disappear over time. Can anyone confirm that this is from the glue at the genius bar? not some additional new defect? I've read the uncured glue comment is a myth.