ON DUPLICATE KEY UPDATE - Same Query Different Results (no replies)

In my test app; Successive execution of the following query always returns positive row count, even when there is no change.

insert into test (k,v) values ('testkey',123)
on duplicate key update v=values(v);

The query works as expected in MySQL Console and MySQL Workbench. I get 1 for the first insert and 0 for the successive calls.

However when I try in my C# test app I always get 2 even when nothing changes inside the row.

Any ideas? Am I missing something while setting up the connection?

This is my test table:

CREATE TABLE `test` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`k` varchar(45) DEFAULT NULL,
`v` varchar(45) DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `icol_UNIQUE` (`k`)
) ENGINE=MyISAM AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;


And this is my tiny test code:

using (var con = new MySqlConnection("Database=mydb;Data Source=localhost;User Id=root;Password=mypass;CharSet=utf8;"))
{
con.Open();
var cmd = new MySqlCommand("insert into test (k,v) values ('testkey',123) on duplicate key update v=values(v)", con);
var rows = cmd.ExecuteNonQuery();

Console.WriteLine(rows); // rows is always 2
}

NOTES:

- I am using MySql .Net Connector 6.9.8
- All database charset/collation settings are utf8