When editing (typing) a text in Notes or Description field in landscape view mode - no text is visible in the window. In portrait mode typed text appears, but disappears again in landscape when I point on the field to start editing. iPhone 5s IOS 7.1.1.
Yes, I have the same behaviour on an iPhone 4S on iOS 7.1.1.
When you hide the keyboard in the Notes (using the little keyboard in the top right corner), the notes will stay visible then your rotate the screen. However, when you enable the keyboard again, the Notes wil be hidden again.