That was the oddest phone call glitch. I phoned someone in the UK, after the first minute or so, I heard the ringing sound again while the connection was still up, and it seemed my counterpart picked up again, however it was a full playback of their side of the conversation. Then I hung up, and rang my counterpart back. They said they stopped hearing me, but the connection persisted (apparently while I got the play back from the ringing and their half of the previous parts of the conversation). Can’t come up with a simple tech explanation that does not involve capturing and storing the entire phonecall.