Can't set playlist to privat via the API

[alpipego]

Plan

Premium

Country

Germany

`Put`ting a playlist to `public: false` via the API does not work (https://developer.spotify.com/documentation/web-api/reference/change-playlist-details). On the next request, the URL is `public: true` again.

Moreover, doing this is in conjunction with `collaborative` does not set persist either value to what's been set via the API.