Can't use placeholder in a multiple select

[nizukameha]

Hello, I'm wondering why the placeholder isn't displayed for a multiple select. For example, in this code:

<Select
    value={values}
    placeholder={"test"}
    isMultiple={true}
    onChange={handleSelectChange}
    options={options}
/>

My placeholder isn't displayed, and the placeholder by default "Select..." isn't displayed either. I don't know why.