So I have been having these issues were the clip that I insert into vegas pro is fine but vegas pro, after some editing and viewing in the program without rendering, makes the clip appear blank. This was a massive nuance because every time I render a video I have to check whether or not the any part of the video is just blank. Sometimes only small portions of the video would go blank, usually were one clip ended and another started. And that wasn’t due to them not being connected, I checked that multiple times. Anyway, I found a solution:
All you have to do is right click on the clip that you have inserted into the timeline, then go to “switches” and click on “disable re-sample”. Problem fixed.