I heard an expert talking about it and they said analysis of the sound showed some kind of audio loop indicating copy-paste (I didn’t understand the technicalities) which indicated the audio was manipulated.

If this is how they do their routine updates, they have had an extremely lucky run so far. Inadequate understanding of what the update would/could do, inadequate testing prior to deployment, no rollback capability, no disaster recovery plan. Yeah nah, you can’t get that lucky for that long. Maybe they have cut budget or sacked the people who knew what they were doing? Let’s hope they learn from this.