Could you post a link of the playlist you want to share, so we can have a look at it?
We'd also like you to check if by chance you're not adding the playlist to a different profile (logged in another profile) while your friends follow another one. We can check this, if you provide us with a screenshot of what your friends see when they have a look at your profile in the app.
In the meantime you can check once more on this page how to add playlists to your profile for others to see.
Keep us posted,
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