Viewing Cities Deletes The Buildings

At war with Egypt. Just took over 2 of their cities with crossbowman and horsemen. However when i clicked view city to look at what they contained, the buildings flickered then vanished; turning the cities into building-less.

I've restarted my comp and will retest again later.
Any help?

Well some buildings are destroyed when you capture a cities, were the buildings there when you first captured it and then disappeared some time later, or just disappeared when you first went to look at your new city? If the latter it's not a bug.

It was full of buildings and a wonder. They did display but then vanished.
e.g granary was there but no more.