This bug has kept me from editing on the mobile site for the last few months. I was hoping it was just temporary, but no such luck.

If you edit a section or article on the mobile site in iOS, when the on-screen keyboard comes up it obscures the bottom part of the content and the viewpane is anchored to the bottom of the screen rather than the top of the keyboard, so it is impossible to bring the last few sentences of the content into view, and thus be able to edit it.

Using iOS 9.3.2 on an iPhone 5.