The value obtained after deserializing the bool value using MemoryPackSerializerOptions.Utf16 is incorrect

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I just want to use unicode encoding and MemoryPackSerializerOptions.Utf16 for may data, but the bool value deserialized by the MemoryPackSerializerOptions.Utf16 Option is wrong. What causes this

var da = Encoding.Unicode.GetString(MemoryPackSerializer.Serialize(false, MemoryPackSerializerOptions.Utf16));
Console.WriteLine(MemoryPackSerializer.Deserialize( Encoding.Unicode.GetBytes(da),MemoryPackSerializerOptions.Utf16));

Outputs:
True