Property marked dirty when using custom BindUsing

[mvinas1977]

I have this simple model

class Club {

    String name

    static constraints = {
        name nullable: false
    }
}

class Player {

    String name

    @BindUsing({ Player player, SimpleMapDataBindingSource source ->

        if (source['club']?.id) {
            return Club.get(source['club']?.id as Long)
        }
    })
    Club club

    static constraints = {
        name nullable: false
        club nullable: false
    }
}

Player has a custom binding ... if you bind same club it marks club as dirty when it should not. this simple test reproduce the error

   void "test dirty hibernate"() {
        given:
        Club club = Club.findByName('Boca Juniors')
        assert club
        Player player = Player.findByName('Juan Roman Riquelme')
        assert player

        when:
        player.properties = [club: [id: club.id]]

        then:
        !player.hasChanged('club')
    }

Same code works fine with hibernate

I shared a proyect with this example app to reproduce this error https://github.com/mvinas1977/gorm-proxy-dirty-property-issue

I'm using the following versions

grailsVersion=3.3.5
gormVersion=6.1.10.BUILD-SNAPSHOT
grailsNeo4jPluginVersion=6.2.0.BUILD-SNAPSHOT