For the past month, I have a 3GB iCloud Photo Library on both my iPad and iPhone (both are 64GB devices with 30+GB free). They are both set to 'download and keep originals' on both devices. However, whenever I tap a picture on my iPhone, I get a low-res version of the photo with a loading-bar. Then, after a minute or so, I get the high-res version. Why isn't my iPhone downloading the originals? It's been over a month, both devices get charged at night and have wifi. Whenever I look into settings of both devices, iCloud Photo Library says up-to-date (or whatever).