I don't run nvidia surround but i do run 3 monitors and im having serious problems with the taskbar as well. When im playing GTA5 ill do alt tab and the only option shown is GTA5 when i literally have 20 other programs open. Then while playing other games like WoW in borderless windowed mode when i alt tab the taskbar of the main monitor the game is on doesn't appear overtop the game. Prior to the update when i alt tabbed it would show the task bar and let me click items on it. I originally didn't know if it was DF causing the problem since i had just did a clean install of windows 10 anniversary but now that i saw this post i remembered it updated to a new one the day after i did the update.
Please tell me there is some sort of solution in the works here. Between this and edge remaining on the main taskbar regardless of which screen its on are highly annoying