No. I've never missed PreCheck on an eligible airline (which I have via GE) since I got GE in 2012 -- even when I don't have status on the airline in question.
Are you sure AA didn't just accidentally drop it from the reservation (as DL IT is prone to do -- and has happened when I book DL trips with my wife and they drop her KTN if I'm not paying attention)? You should be able to call up and have them check and if it's in there, add and remove it and it should show up.