Rendering problems when using WAYWindow

[mike-lischke]

This issue might not directly related to WAYWindow. I cannot see anything in the code that could be causing this, but when WAYWindow is active I get many warnings about CGContextRefs being 0 on application startup. I'm using CorePlot in my app and for the first CALayer.renderInContext call I get a context reference of 0 too, which is totally unusual (as any code in that routine is supposed to draw into the given context).

There might be a bug actually in the NSTitlebarAccessoryViewController, not sure.