I'm using Select2 for a project. The second select box gets filled depending on the selected item in the first box, as shown in the link below. However, I can't click the first item in the second select box for some reason. The only way for me to select the first item if I want to, is to first select a different user, and then back to the first. How can I solve this?

Video:

My code:

This is the first select box, getting filled by regular PHP (Laravel). Everything works fine here.

<div class="form-group">
    <label for="select"> Partner: </label>
    <select id="select" name="select" class="searchselect searchselectstyle">
        @foreach($partners as $i => $partner)
            <option {{$i == 0 ? 'selected' : ''}} value="{{$partner->id}}">{{$partner->name}}</option>
        @endforeach
    </select>
</div>

Here Is the second select box, with the error.

<div class="form-group" >
    <label for="select2"> Hoofdgebruiker: </label>
    <select id="select2" style="min-width: 200px;" name="select2" class="searchselect searchselectstyle">

    </select>
</div>


<script type="text/javascript">
$(document).ready(function(){
    var url = '/json/getusers';
    var $post = {};
    $post.id = $("select").val();

    $.ajax({
        type: "POST",
        dataType: "json",
        url: url,
        data: $post,
        cache: false
    }).done(function(data){
                $('#select2')
                        .find('option')
                        .remove()
                        .end();

                $.each(data, function(i, value) {
                    console.log(data);
                    $('#select2').append($('<option>').text(value.text).attr('value', value.id));
                });
            }
    );
});

-

public function getusers(){
    if(!isset($_POST['term'])){
        $users = User::where('partner_id', $_POST['id'])->get();
    }else{
        $wildcard = '%'.$_POST['term'].'%';
        $users = User::where('partner_id', $_POST['id'])->where('email', 'LIKE',  $wildcard)->get();
    }

    $array = array();

    foreach($users as $i => $user){
        $array[$i] = array("id" => $user->id, "text" => $user->email);
    }
    return response()->json($array);
}