Ever since I enabled iCloud Photo Library, only my most recent photos have been appearing in apps. For example, if I go to upload a picture to Twitter, only the last 70 out of 300 pictures are shown. This holds true for other apps like Instagram and Dropbox, but the numbers do vary slightly (anywhere from 70 go 66 photos).
When I change my profile picture on Instagram, I have access to Momements, which includes all the photos, but not when uploading a picture to post.
Is there an issue with my iPhone, or is this a bug?