Kartik Gridview successfully do Ajax Filter, but also reload whole page

I’m using Kartik Gridview and Pjax inside a modal. When I tried to filter something, the ajax filter works fine, but after that, the page is reloaded. What could be the cause? Please help.

use yii\bootstrap\Modal;

use kartik\grid\GridView;

use frontend\components\LabelComponent;

use yii\widgets\Pjax;

    

Modal::begin(['header' => '<h3>Member List</h3>', 'id' => 'modal-browse-member']);

    GridView::widget([

		'id' => 'browse-member-grid',

		'dataProvider' => $dataProvider,

		'filterModel' => $searchModel,

		'pjax' => true,

                'pjaxSettings' => [

                    'neverTimeout' => true,

                ],

		'summary' => LabelComponent::GRID_SUMMARY,

		'columns' => [

			'member_card_number',

			'member_name',

			[

				'attribute' => 'member_address',

				'format' => 'raw',

			],

			'member_phone1',

			'member_phone2',

			[

				'attribute' => 'member_type',

				'value' => function ($model, $key, $index, $column){

					return $model->getTypeLabel($model->member_type);

				},

				'filter' => $searchModel->getTypeLabel(),

			],

		],

	]);

Modal::end();