Omg someone please tell me how to disable all these boss rush notifications! All my game alerts are off, but that banner is still flashing across my screen with the sound effects constantly. Thank you!

I couldn't agree more - I can't find it in the settings either and it is annoying as hell - how do we turn this off?

Guess I should have checked Reddit first - apparently the server first levels are broadcast and we'll have to live with it until the big guns are through and maxed it all out.