I've not seen this reported yet.
In Path of Exile, whenever I record, the first 5 or so minutes are fine, but every single time at 5 minutes in the audio simply cuts out in the recording.
Additionally, the recording simply refuses to play from VLC or Windows Media player past the 5 minute mark.
Uploading the video to Facebook or youtube allows the video to play beyond the 5 minute mark, but the audio will be missing past that point.
I've only seen this issue in Path of Exile.
In other games I do get audio desync issues at times, but this is another problem entirely.
Has anyone else experienced this, and were you able to fix it?