Landmarks with destroyed label still have 1 life point, forever

In all my matches, the landmarks that should be destroyed already(they have the tag warning that they have been destroyed), keep 1 life point, and this causes the AI to keep shooting at them forever. Sometimes, in matches where the AI wasn’t shooting at them before, if the game is saved and reloaded later, the AI starts firing at them forever, probably because they have this single life point