Game DLC says not installed on other xbox?

Didn't know whether to post this here or to r/ARK because it might be a problem with the game itself, but it seems to be the xbox/storage. I use an external hard drive for a lot of my games, which includes ARK. I bought the season pass that gave me access to all 3 current DLCs and have them installed. at the weekends I go to my dad's and since he has an xbox 1 there I just bring my hard drive, controller and 1 or 2 disc games. But for some reason, while ARK itself and all of my save data are the same on both consoles, the 3 DLC maps specifically won't load and will instead say the DLCs are 'Not yet installed'. I've checked on the 'manage game and add-ons' section for ARK, and absolutely everything to do with it says it is stored in my external hard drive. Does anyone know why it says they aren't installed when I'm on the other xbox?