Email address not available when logging in with native iOS app



I’m having some issues after logging in with Twitter for iOS:

I’m using Fabric. My app is whitelisted and I’ve already have authorization to request the email address from the user in the panel. When I log in using the Native Android application I’m able to retrieve the user email address. (The user in his/her Twitter settings panel can see the app and the authorized permissions: ‘Read and Write. Has access to the email address’)

However, when I log in using the native iPhone Twitter app the verify_credentials endpoint doesnt return the email property, and when the user checks his/her Twitter settings panel it just appears that the app only have ‘Read and Write’, but there is no menction of the email address.

Do I have to add something else in order to ask the permissions on iOS?