Apple OSes and Wifi captive portal. CNA Documentation or else ?

Hello Apple teams,

It's weeks I'm trying to make my Wifi Hotspot (captive portal)

work with Apple OSes (iOS, OSX).

I mean, to have a full working process with the Captive Network Assistant.

Today, it works with a bunch of other OSes (Andro1d, W1n, ...),

but with "iOSX", it's still does not.

What a pity, cause my company and our Wifi HotSpot targets

Apple devices users.

Well, what works with iOSX, cause it works 50% :

When one join the Wifi (Wifi Settings), the CNA window appears.

This displays our "hello login page", one user can login,

and then, we expected 2 things:

- the "Cancel" button begins "Done" button,

- if possible, the CNA window closes.

Anyway, I **promise** that the Internet is reachable as soon as user is logged in.

But this "Cancel->Down" **never** happens.

(Consequently, on iOS, the Wifi is never joined, and Safari navigation is impossible).

What should we do for iOSX to know that - yay - the login happened and it's successful ?

We're totally blind with it.

Please, where is the documentation related to ?

Thank you,

A desesperate i/OS/X developer.