Notification Center stuck in landscape orientation

This screenshot pretty much says it all:

Notification Center seems stuck in landscape mode, based on the height and horizontal distance from the edge to the center pulldown arrow.

• The date and top widget update correctly
• I can interact with (what I can see of) the top widget
• I can't swipe the arrow up to dismiss Notification Center
• I can't interact with the visible screen "behind" Notification Center

The home button dismisses Notification Center as usual. This behavior has persisted across several restarts.

Interestingly, I can't bring down Notification Center while in real landscape mode. I can get the little arrow tab to come down, but in the wrong spot:

...but pulling down on the tab just dismisses it.

Is there anything I can do to troubleshoot this short of a restore?

iPhone 5, iOS 8.3.

Solution 1:

Something similar happened to me once like this. Try a hard restart by holding both the power and the home buttons until you see the Apple icon appear on the screen. Let me know if that works.