encoding problems on BLOB fields

#!/usr/bin/perl

use v5.24;
use warnings;
use utf8;

use Mojo::mysql;
use Data::Dumper;
use Encode;


my $db_name = $ARGV[0] // 'mydb';

my $mysql = Mojo::mysql->strict_mode("mysql://dbuser:dbuser\@localhost/$db_name");
my $db = $mysql->db;

my $string = "Αλέξανδρος";

my $id = $db->insert('a_test',
    {
        name => $string,
        data => encode_utf8($string),
    }
)->last_insert_id;

my $row = $db->select('a_test',
    undef,
    {
        id => $id,
    }
)->hash     or die 'row not found';

print Dumper({
    row => $row,
    string => $string,
    row_name_is_same_as_inserted => $row->{name} eq $string,
    row_data_is_same_as_inserted => $row->{data} eq encode_utf8($string),
});

__END__

MariaDB [mydb]> show create table a_test;
+--------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table  | Create Table                                                                                                                                                                                         |
+--------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| a_test | CREATE TABLE `a_test` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) DEFAULT NULL,
  `data` longblob,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8mb4 |
+--------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

Output:
$VAR1 = {
          'row_data_is_same_as_inserted' => '',
          'string' => "\x{391}\x{3bb}\x{3ad}\x{3be}\x{3b1}\x{3bd}\x{3b4}\x{3c1}\x{3bf}\x{3c2}",
          'row_name_is_same_as_inserted' => 1,
          'row' => {
                     'id' => 5,
                     'name' => "\x{391}\x{3bb}\x{3ad}\x{3be}\x{3b1}\x{3bd}\x{3b4}\x{3c1}\x{3bf}\x{3c2}",
                     'data' => 'ÎλÎ<U+00AD>ξανδÏοÏ'
                   }
        };