https://bugs.winehq.org/show_bug.cgi?id=37180
--- Comment #9 from tblodt@icloud.com --- After reading the log file more, it looks like the bug has something to do with the fact that when you click or right click in the viewport, it creates a new child window and sets the mouse capture to that window. It then removes the window when the mouse button goes up. I will investigate further.