Custom repeatable field type missing data when update

I have a custom cmb2 field called as pb_info, which is consist of 4 different field abbreviation (select), course code(text), pe point( number), pe hour (number). and i want to use it inside a repeatable group as a group field. my code is work fine until i am inserting 2 rows of data, but it miss after 2nd row that means from 3rd row it missing data. and when i inspect it i saw from 3rd row the id of input field is not changing.

Here is my code :

registering field behaviour :

 function cmb2_render_pb_info_field_callback( $field, $value, $object_id, $object_type, $field_type ) {
    $value = wp_parse_args( $value, array(
    'pb_abbreviation' => '',
    'pb_crs_cd' => '',
    'pe_pnt'  => '',
    'pe_hr'     => '',
    ) );

?>
<div class="alignleft"><p><label for="<?php echo $field_type->_id( '_pb_abbreviation' ); ?>'">PB Abbreviation</label></p>
    <?php 
        echo $field_type->select( array(
        'name'    => $field_type->_name( '[pb_abbreviation]' ),
        'id'      => $field_type->_id( '_pb_abbreviation' ),
        'options' => cmb2_get_abbr_options( $value['pb_abbreviation'] ),
        'desc'    => '',

        ) ); 
    ?>
</div>
<div class="alignleft use_maxlength_validator"><p><label for="<?php echo $field_type->_id( '_pb_crs_cd' ); ?>'">PB Course Code</label></p>
    <?php echo $field_type->input( array(
        'class' => 'cmb_text_small',
        'name'  => $field_type->_name( '[pb_crs_cd]' ),
        'id'    => $field_type->_id( '_pb_crs_cd' ),
        'value' => $value['pb_crs_cd'],
        'maxlength' => 20,
        'desc'  => '',
    ) ); ?>
</div>
<div class="alignleft pb_credit"><p><label for="<?php echo $field_type->_id( '_pe_pnt' ); ?>'">PE Point</label></p>
    <?php echo $field_type->input( array(
        'class' => 'cmb_text_small',
        'name'  => $field_type->_name( '[pe_pnt]' ),
        'id'    => $field_type->_id( '_pe_pnt' ),
        'value' => $value['pe_pnt'],
        'desc'  => '',
    ) ); ?>
</div>
<div class="alignleft pb_hour"><p><label for="<?php echo $field_type->_id( '_pe_hr' ); ?>'">PE Hour</label></p>
    <?php echo $field_type->input( array(
        'class' => 'cmb_text_small',
        'name'  => $field_type->_name( '[pe_hr]' ),
        'id'    => $field_type->_id( '_pe_hr' ),
        'value' => $value['pe_hr'],
        'desc'  => '',
    ) ); ?>
</div>
<br class="clear">
<?php
    echo $field_type->_desc( true );

}
add_filter( 'cmb2_render_pb_info', 'cmb2_render_pb_info_field_callback', 10, 5 );
add_filter( 'cmb2_sanitize_pb_info', 'maybe_save_split_pb_values', 12, 4 );
/**
    * The following snippets are required for allowing the pb_info field
    * to work as a repeatable field, or in a repeatable group
*/
add_filter( 'cmb2_sanitize_pb_info','pb_sanitize', 10, 5 );
add_filter( 'cmb2_types_esc_pb_info', 'pb_escape', 10, 4 );

/**
    * Optionally save the Pb Info values into separate fields
*/

function pb_sanitize( $check, $meta_value, $object_id, $field_args, $sanitize_object ) {
    if ( ! is_array( $meta_value ) || ! $field_args['repeatable'] ) { return $check;  }
    foreach ( $meta_value as $key => $val ) {
        $meta_value[ $key ] = array_filter( array_map( 'sanitize_text_field', $val ) );
    }
    return array_filter($meta_value);
}

function maybe_save_split_pb_values( $override_value, $value, $object_id, $field_args ) {

    foreach ($override_value as $key => $data) {
        if($data['pb_crs_cd'] == '' && $data['pe_hr'] == '' && $data['pe_pnt'] == '' ){
            unset($override_value[$key]);
        }
    }
    if ( ! isset( $field_args['split_values'] ) || ! $field_args['split_values'] ) {
        // Don't do the override
        return $override_value;
    }
    foreach ($value as $key => $data) {
        if($data['pb_crs_cd'] == '' && $data['pe_hr'] == '' && $data['pe_pnt'] == '' ){
            unset($value[$key]);
        }
    }
    $pb_info_keys = array( 'pb_abbreviation', 'pb_crs_cd', 'pe_pnt', 'pe_hr' );
    foreach ( $pb_info_keys as $key ) {
        if ( ! empty( $value[ $key ] ) ) {
            update_post_meta( $object_id, $field_args['id'] . 'addr_'. $key, sanitize_text_field( $value[ $key ] ) );
        }
    }
    remove_filter( 'cmb2_sanitize__pb_info', 'pb_sanitize', 10, 5 );
    return true;
}

function pb_escape( $check, $meta_value, $field_args, $field_object ) {
    if ( ! is_array( $meta_value ) || ! $field_args['repeatable'] ) { return $check;  }
    foreach ( $meta_value as $key => $val ) { $meta_value[ $key ] = array_filter( array_map( 'esc_attr', $val ) );  }
    return array_filter($meta_value);
}

function cmb2_get_abbr_options( $value = false ) {
    $terms = get_terms( 'professional-body', array( 'hide_empty' => false, ) );
    $pb_abbreviation = '';
    $meta_key = "abbreviation";
    foreach ( $terms  as $term ) {
        $pb_abbreviation .= '<option value="'.  $term->term_id .'" '. selected( $value, $term->term_id, false ) .'>'. get_pb_meta( $term->term_id, $meta_key) .'</option>';
    }
    return $pb_abbreviation;
}

And the field initialization is:

$lu = new_cmb2_box( array(
‘id’ => $prefix.’mcptr{#}’,
‘title’ => _(‘Round Informations’),
‘object_types’ => array(‘mcpt’),
‘context’ => ‘normal’,
‘priority’ => ‘high’,
‘show_names’ => true,
));
$group_field_id = $lu->add_field( array(
‘id’ => $prefix.’mcptre’,
‘class’ => $prefix.’mcptgrp’,
‘type’ => ‘group’,
‘repeatable’ => true,
‘options’ => array(
‘group_title’ => __( ‘Rounds {#}’, ‘cmb2’ ),
‘closed’ => false,
‘add_button’ => __( ‘Another Round’, ‘cmb2’ ),
‘remove_button’ => __( ‘Remove Round’, ‘cmb2’ ),
‘sortable’ => true,
),
) );

$lu->add_group_field( $group_field_id, array(
‘name’ => ‘PB Info’,
‘id’ => $prefix.’pb_info_field’,
‘type’ => ‘pb_info’,
‘repeatable’ => true,
‘classes’ => ‘pb_lu_info’
) );
`
So how can i fix the problem, i have never mention to do something special at row number 2 or 3, but somehow it take 2 rows of value and after 3rd row it stops changing id.