after software keyboard is shown and input some text, if we click "ENTER" or "DONE", text will be saved as expted.

But if we click the "hide keyboard" button, previously inputed text won't be saved.

Sometimes we touch "hide" button by mistake, and will lost what we inputed, and, native apps don't behave like this.

Yeap, you are right.
We will improve it.
Sorry for it.