what-input: Using tab to change input elements does not trigger keyboard event

Shouldn’t changing focus from one element to another using TAB change the input type to keyboard?

Steps to reproduce at demo page:

1. use mouse to click input Email address
2. use keyboard TAB key to change focus to input Password
3. input type stays as mouse 💣

If you keep using keyboard TAB key to change focus, it will change input type to mouse when button Submit is focused, which seems inconsistent