Hard to explain but the windows sources used to ignore all windows and anything layered above the window source. Now if I have something obscuring the view of a window, it gets put into the window source as well. I'm thinking this started at the 0.14.1 update.
Log file link: https://gist.github.com/9f8f69e3098c4230f7c7a5fb1ce25ec3
Log file link: https://gist.github.com/9f8f69e3098c4230f7c7a5fb1ce25ec3