@AmishCake: I was just trying to provide some help in form of a workaround, so I'd appreciate if we could keep it friendly and helpful to help us finding a workaround until the bug is fixed by Apple.
However, I feel I need to address some facts, as you mention I stated "absolute nonsense":
- Reboot: Rebooting the phone means switching it off and on again. This way, current preferences get saved and the OS is shutting down properly.
- Force Reset: Pressing Home+Power buttons is like pulling the power cord of a PC, you're resetting the system, thus there might be issues if you interrupt the system while it does something important.
This is not just an opinion, but a fact:
"You should reset your device as a last resort and only if you can't restart it."
see Apple Tech Docs: Turn your iOS device off and on (restart) and reset
Moreover, as I found out by trying (thanks to someone here mentioning it could be "Reachability"-related), it should be sufficient to just lock the screen and unlock it again to make that bug disappear. Telling people to hard-reset their devices is in fact an unnecessary overkill and might result in dataloss if you're extremely unlucky.
I'd appreciate if someone could confirm or deny this workaround.
It worked for me (twice) on an iPhone 6 running iOS 8.0.2.