Dapper problem with a nullable Guid? types

I have problem with Dapper and Guid? type. I created that demo project:

Database MySQL (table entities):

CREATE TABLE `entities` (
  `id` int NOT NULL AUTO_INCREMENT,
  `notnullguid` char(36) NOT NULL,
  `nullguid` char(36) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;

First Guid field - not null, second - nullable (with NULL as default value).

Demo data:

My entity:

public class Entity
{
    public int Id {get; set; }
    public Guid NotNullGuid { get; set; }
    public Guid? NullGuid { get; set; }
}

My query:

//PROBLEM:
Entity e1 = db.Query<Entity>("SELECT * FROM entities WHERE id=1").First(); //Not working

//WORKING - all variations:
Entity e2 = db.Query<Entity>("SELECT * FROM entities WHERE id=2").First(); //Working
Entity e3 = db.Query<Entity>("SELECT notnullguid FROM ents WHERE id=1;").First(); //Working
Entity e4 = db.Query<Entity>("SELECT notnullguid, NULL as nullguid FROM ents WHERE id=1;").First(); //Working
Entity e5 = db.Query<Entity>("SELECT notnullguid, IFNULL(nullguid, NULL) FROM ents WHERE id=1;").First(); //Working

If I get id=1 I have that exception:

System.Data.DataException: 'Error parsing column 2 (nullguid=7b137c4e-38db-11eb-adec-a85e45e499a0 - Object)' This exception was originally thrown at this call stack:
System.Data.DataException HResult=0x80131501 Message=Error parsing column 2 (nullguid=7b137c4e-38db-11eb-adec-a85e45e499a0 - Object)
Source=Dapper StackTrace: at Dapper.SqlMapper.ThrowDataException(Exception ex, Int32 index, IDataReader reader, Object value) in //Dapper/SqlMapper.cs:line 3665 at Dapper.SqlMapper.d__1401.MoveNext() in /_/Dapper/SqlMapper.cs:line 1102 at System.Collections.Generic.List1..ctor(IEnumerable1 collection) at System.Linq.Enumerable.ToList[TSource](IEnumerable1 source) at Dapper.SqlMapper.Query[T](IDbConnection cnn, String sql, Object param, IDbTransaction transaction, Boolean buffered, Nullable1 commandTimeout, Nullable1 commandType) in //Dapper/SqlMapper.cs:line 725 at DapperGuidParsing.Program.Main(String[] args) in C:\Users\Dmytro\source\repos\DapperGuidParsing\DapperGuidParsing\Program.cs:line 21

This exception was originally thrown at this call stack: System.ThrowHelper.ThrowArgumentOutOfRangeException(System.ExceptionArgument, System.ExceptionResource) System.Text.UTF8Encoding.GetString(byte[], int, int) MySql.Data.MySqlClient.NativeDriver.ReadColumnValue(int, MySql.Data.MySqlClient.MySqlField, MySql.Data.Types.IMySqlValue) MySql.Data.MySqlClient.ResultSet.this[int].get(int) MySql.Data.MySqlClient.MySqlDataReader.GetFieldValue(int, bool) MySql.Data.MySqlClient.MySqlDataReader.GetValue(int) MySql.Data.MySqlClient.MySqlDataReader.this[int].get(int) Inner Exception 1: ArgumentOutOfRangeException: Non-negative number required.

Why? :| And how I can fix this?

Some tech info: .NET Core 3.1 Console App, Dapper 2.0.78, MySql.Data 8.0.22.

Everything worked as it should, when you install Nuget package MySqlConnector

//Working
IDbConnection db = new MySqlConnector.MySqlConnection(this.ConnectionString);

//Not working (default MySqlConnection from MySql.Data package)
//IDbConnection db = new MySql.Data.MySqlClient.MySqlConnection(this.ConnectionString);