We're looking into a few cases where mobile live streams appear deleted if metadata (title, description, tags) or change privacy setting (public, unlisted) is edited while processing. It shows: "the video has been removed by the user". Thanks for the reports–updates to follow!
Due to the high volume of requests, there are applications for the YouTube Partner Program that are still pending. The team hopes to review all open applications by the end of June. More info: https://goo.gl/aXrNJJ