In Battlefield 4 in commander mode I recently had a game where a large area was blocked from scanning for virtually the whole map (it started about mid game of a 3000 ticket game and then didn't end and didn't move an inch, or even a pixel for over 10 mins)
It was a very long match and the enemy commander used EMP UAV's in other places, so it wasn't that.
Was it a bug? A deployable? How can I counter this?