NPM Server doesn't understand %2F

I tried to cache the datatables.net packages that i use in my projects on my private npm registry so that pipelines can run faster using Verdaccio.

Pretty simple error, the npm.datatables.net registry only recognizes / and %2f, but not %2F

https://npm.datatables.net/@datatables.net/editor-bs5
works (status code 200)

https://npm.datatables.net/@datatables.net%2feditor-bs5
works (status code 200)

https://npm.datatables.net/@datatables.net%2Feditor-bs5
doesn't work (status code 403)
{
"error": "Not an Editor package that was requested. This registry holds only DataTables Editor packages."
}

--

The same 3 link variants work fine on another private npm registry (fontawesome), so i'm pretty sure its not a client problem.