Why does the number pad do this (iOS 9)?

Question

I believe this began with iOS 9 but it may also have been one of the later releases of iOS 8. Basically, numberpad pops up but the actual characters on each button are gone (1-9, 0). I've truncated the top half of this image for confidentiality:

Answer 1

I had the same issue when setting the keyboard type in IB. But setting it programatically in the viewDidLoad method solved the issue for me (see my answer on another thread).