Reported as bug #25710717
Summary:
I have Night Shift set to the Sunset-Sunrise schedule. Around Noon today, screen was still "yellow" and yet the Night Shift icon in the Control Panel was set to off. Had to toggle this icon a few times before screen colors came out of Night Shift mode.
Steps to Reproduce:
1. Set Night Shift to "Scheduled" and select "Sunset to Sunrise" option.
2. "Manually Enable Until..." is set to "off".
3. During daylight hours activate phone screen.
4. Observe screen colors are still "yellow".
5. Observe Night Shift icon in Control Panel is set to "off".
Expected Results:
As per schedule, I expect Night Shift mode to be disabled during the day. Also, if the Night Shift icon in Control Panel is showing "off", the screen colors should be normal, not "yellow".
Actual Results:
Sometimes I see the screen is still "yellow" during daylight hours despite the Control Panel icon showing Night Shift set to "off". I am able to get the screen colors back to normal by toggling the Night Shift button in the Control Panel several times.
Version:
iOS 9.3.1 [13E238]
Notes:
Problem occurs randomly and rarely. Several others are reporting the same issue in the Apple forums.
Configuration:
iPhone 5s, 32 GB, Verizon