Hi there. Live streaming can be revoked for several reasons. Could you send a screenshot of your "Status and Features" page: https://goo.gl/FFqv9P ? Also, do you see the stream in your 'Copyrights notices' page: https://goo.gl/bAuPtU ? We'll look into it. Thanks.
Thanks for the screenshots. You should've received an email explaining the reasons for live streaming being disabled on your channel. Here's more info on why this may happen: https://goo.gl/bBy8Ki . Hope this helps.