This is very annoying.
When the bot encounters this bug then black screen appears + fps drops + high CPU load. This very often began to appear on flying profiles.
It seemed to me that it was breaking UI or WORLD FRAME. Because RELOAD UI helps to get out of this bug. But when it happens WorldFrame:IsVisible() or IsShown() returns true, that is, they are visible. So what is it? So what to do? What can be done? How fix this or prevent this?