Lost prestige when no troops lost - bug?
I have a level 2 fortification occupied. All troops on hunt, so no troops in city or any of my oasis or fortifications. Someone attacked my fortification twice while I was away, and I lost 600 prestige across the two fights, with the war report showing a standard computer-controlled set of force counts in the first fight, and reduced in second fight. I retained control of the fortification despite the two losses.
So I'm very confused. I left no troops in the fortification, yet the computer still defended the fortification and I lost prestige. The money isn't worth the exposure to loss of prestige. Is this a bug, or is it supposed to work that way?