iOS 11.2.1 Do not disturb icon bug (iPhone SE)

Do not disturb "moon" icon is not properly displayed on the main screen when I activate it. It is there when I am in some app (like messages), but disappears again when I return to main screen. I have to turn the display off and on again (with the power button) and then it works properly. When I turn DND off and on, the icon disappears again.

I wanted to send this via Bug Reporter, but it tells me my account doesn't exist, so I'm trying it at least here. If anyone knows the secret dark magic needed to report a bug to Apple, please do report it. Thank you.