There seems to be an issue with the keyup event being fired on the wrong field when quickly tabbing to the next field after typing. The keyup event is being fired on the field that was tabbed to instead of on the field that was typed in.

Steps to reproduce:

1. Type "testing" in an input field
2. Quickly tab away from the field

After doing this the model's attribute will be "testin", as the field never received the last keyup event.