So, just competed a 13 hour flight.
For the first 10 or so hours I had all audio (engines, ATC, seat belt sounds etc). However, after about 10 or so hours everything stopped. No audio whatsoever. Around 11 hours I regained ATC audio, however all other audio wasn’t working.
The rest of the audio stopped working from there on.
Is this a ongoing issue, or something that’s crept up very recently.