A few days ago, I purchased both Avengers movies. On my iPhone and iPad, the first one is missing. It does show up in iTunes as purchased, and it shows up on all my computers in iTunes and on my AppleTV, but not on my phone or pad. I downloaded it to my iPhone, and then it shows up, but when I remove the download it disappears again. Not a major issue, of course, since I can download it from my purchases in iTunes, but I'm wondering why this might be happening?