Apple TV - iCloud photo stream repeated re-authorization

Every day, I have to reauthorize my photo stream connection with my Apple TV so that the screen saver will show our photo stream photos. Does anyone have any idea why Apple TV requires repeated re-authorization to access my photo stream photos?

Yesterday, the screen saver was functioning fine, and they all of the sudden it defaulted to the silly animals in africa that comes standard with the TV. It literally just switched after a moment. There is no loss of wireless connection, internet is fine. I can't find any settings that would cause this required constant reauthorization in the device settings.

Any ideas?

Product info: second generation apple tv, current update.