Resource pack removed from Global resources upon exiting the game

I normally have the minecraft texture pack applied in global resources, since I like the old textures more, but whenever I enter the app after not using it for a while, it gets deactivated. Usually an in-game notification stating ‘minecraft classic texture pack deactivated, this account does not own this texture pack’ appears, which was odd, since I do own it. But when I enter settings to see if it really was deactivated, it was still in global resources, and when I exit settings, a pop-up stating ‘loading resource packs’ shows up, as if I had only just applied it. Sometimes, the notification doesn’t show up, but the classic texture pack is no longer applied.