Route masking breaks iOS

[sospedra]

Hello folks, I'm playing around with the experimental feature of custom rewrites.
I add this to my website to create a sort of URL shortener. There's one rewrite right now that redirects https://sospedra.me/r/rjpr to a Spotify playlist.

experimental: {
    async rewrites() {
      "destination": "https://open.spotify.com/playlist/26NYRcXPyIVrItOtlJ5ahO?si=bHu-460kQSixzJTBaxeJUg",
      "source": "/r/rjpr"
   }
}

I noticed a few interesting things:

1. The rewrites do a route masking. So you don't see where have you been redirected. I don' think this is a good idea.
2. If you open the rewrite with an iOS device (iPhone/iPad) it'll break mysteriously because instead of going to the Spotify playlist. It's gonna mess up the domain and path and redirects to https://sospedra.me/playlist/id-id-id. Which of course doesn't exist.
3. It works in my local machine both dev and prod env. It goes crazy only when deployed. The masking is consistent tho.

Am I doing something wrong?
Did we find an iOS bug?
Is the masking the intended behaviour of next.js rewrites?

Thanks all!