Alarm icon appearing and disappearing on top bar
Hello there. For some time right now the alarm icon on the top bar has been behaving very strangely. It began disappearing from the bar, even when an alarm is active. But not only that. I noticed sometimes the icon appears and disappears all of a sudden, and I couldn't quite figure out what made it appear or disappear.
The alarm still works (which was my main concern), but it's an error nonetheless. I also noticed that when the icon is active, there's a message on the lock screen saying when the alarm is set to, but when it disappears the message on the lock screen stops appearing as well. Either way, I never had problems with the alarm not ringing at the right time.
I tried deleting the alarm and creating a new one, but the error remains.
Also, it began when my phone had Jelly Bean and now it remains after updating to Kit Kat. I have an I9505 unrooted with stock ROM.