Have been using Vegas for a while, the other night noticed this strange audio distortion in one of my videos. I make music and lyric videos so I make a lot of videos. Have tried many things to resolve it, from changing render settings in my DAW on the music itself and different settings on Vegas, it still remains.

Not only that, but I discovered if I add the music in, and render in the same session, the distortion is almost entirely missing, but if I save and return to the project and render, it is vastly different. Plz help D: It's possible this has been happening for a while and I just didn't catch it but as far as I can tell just started in the last two weeks.

Here is a sample of the exact same audio file, one rendered in the same session it was loaded it, one after saving and returning: