Why are the most recent media not visible in my feed?
In order to provide faster performance, Section Feed will cache media (images) for 30 minutes. This allows next customers to directly see the media, rather than having to load them from Instagram servers all the time. As a consequence, if you post a new media on your Instagram feed, you may have to wait up to 30 minutes before the application re-loads the latest media from Instagram servers.
This limit cannot be changed.