Capping Battleground Timers causes nUI infopanel map to not display
Something to add to your list. I use the Capping addon for BG information and it tries to manage the map and bg map. Just wondering if you could see if the author of capping would work with you to resolve this problem.
I did look in the capping addon and it reparents and resizes the map and bg map. When I commented out this code in capping then the map showed up normally in the infopanel window.