Bidirectional binding of angular data fails on IOS native keyboard

angular1.0 ionic app, uses the keyboard to enter content, and when you click the next button, determine whether the inputs.inputTwo has content, and pop up a prompt if not. The
page code is as follows:

<span>
  <input ng-model="inputs.inputTwo" type="text" placeholder="" />
</span>

the js code is as follows:

    $scope.inputs = {
        inputTwo: ""
    };
    if ($scope.inputs.inputTwo == "") {
        ...
    }

everything is fine on the third-party keyboard on IOS. When using the native keyboard, type in the input box, then click on the space on the page to make input lose focus, and click next. A hint also popped up at this time.

Mar.26,2021
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