Audio Lags at around 20 minute mark

[HippoZoned]

as the title says my audio in my video starts to lag around the 20 minute point in the video, being as i started using mirillis again in hope it will be what i need im highly disappointed because I'm using mirillis to record battlefield 4 abnd anyone that has ever played bf4 they know the matches can take up to an hour or longer.

This is not an big issue and i'll fix the problem in vegas I'd thought you guys should know

I record 30fps 1080p High quality and it records fine up until the 20 minute mark

[radi]

Does the same issue occurs with 360p/30fps settings?