Yesterday I land my full health Jets into the airbase in my city. About 6 hours later I take the jets out of the base to find the jets have damage to them as shown in the screen shot! The city did run out of food, however the jets did not run out of food! Each jets was over 7 mins to repair. I noticed before this incident which happened several times in the same field, that the health of the jets was lower in the airbase then it was when I dispatch them! I think it might be a glitch with the general. Below are screen shots of the jets health inside the airbase and the same jet dispatched from the airbase!
There is also a glitch when you change your capital! The old capital every building has damage to them!