CC Vignette artifacts my comp
I have been having an issue using CC Vignette. About 50% of the time I add it to a comp, it ruins it. I don't know exactly how to explain it, but considering that I haven't found anyone else with this issue, I am assuming it is user error in my project. Here are some screen shots.
Before:

After:

Why would this happen?
I am running 15.0.0.
If you need any more information please let me know!
