When manually focusing an input element with an IME active, the keyboard remains visible, but additional inputs to the keyboard do not register with the focused element.

Steps to reproduce:

1. Enable an additional IME on your iPhone (e.g. Enable Japanese - Romanji keyboard)
2. Visit: https://codepen.io/sean-perkins/pen/PoaNJov on Mobile Safari
3. Tap the focus the input and present the keyboard
4. Tap to change the keyboard to the alternate IME (e.g.: Japanese - Romanji)
5. Type with the keyboard
6. Observe: Keyboard input is registered in the form control
7. Click "Clear" button" with the keyboard open
8. Observe: Input is cleared, focus cursor indicates input is still active/focused
9. Type with the keyboard
10. Observe: Keyboard input is not registered in the form control

User interaction to blur and focus the input will result in the keyboard input being registered in the form control. 

Expected: When using an IME and manually focusing an input element, the keyboard should continue to register changes with the focused element.