Teams Live destroyed an important national public broadcast by not allowing Presenters to rejoin after dropping from the call. Attempts by multiple Presenters to join a call were repeatedly aborted, whether they attempted to join with the Presenter link, or were directly invited into the call by the Producer. Nothing worked. Eventually, it was necessary to abandon further attempts at joining the call. Instead, a Presenter recorded a short video and sent it to another Presenter who was already in the call, who then played it on their behalf. Any insight into what went wrong, or a solution, without dropping the call, which was continuing live?