UpdateStatusComplex updating activity does not accept unicode characters anymore

[MrFastDie]

Usually I updated my bots status like the following:

err = instance.UpdateStatusComplex(discordgo.UpdateStatusData{
    Activities: []*discordgo.Activity{
        &discordgo.Activity{
            Name: "\U0001F970",
            Type: 5,
        },
    },
    Status: "online",
})

But somehow the result on the friends list inside of Discord now is the empty ascii block.

I've tried setting the icon through:

emoji := discordgo.Emoji{
    Name:     "smiling_face_with_3_hearts",
    ID:       "863797433845547048",
    Animated: false,
}

emoji.MessageFormat()

In the Activity status message or just Emoji as the field on Activity included by the master branch but both wont work. The Emoji field as it is not updating anything at all and setting it as custom message just prints me the text <:smiling_face_with_3_hearts:863797433845547048> as status.