FYI, there's another active thread where I complained of the same problem. Restrisiko said that this has been an issue for several months since a previous software update. It's annoying as f--k, and the problem can apply equally to both ground and aerial reconnaissance. In the last 48 hours, I have had submarine units sitting off an enemy city for up to 10 hours before the details of the enemy units present there were revealed. You can try rebooting, clearing your browser cache, and refreshing the game screen, but none of those standard fix-all techniques have helped me.