Which game/scenario and which patch ?
The first AJE 1.02 patch had this bug, but was replaced a few hours later, maybe you have the old version ? Please redownload the 1.02 patch (
http://ageoddl.telechargement.fr/3rdParty/Various/Patch_AJE_v1.02.rar), apply it again.
It is not save compatible, so if you are playing a saved game it can also be a source of this bug
Regards