Instagram is the most used app by users. It has also some faults like sometimes it does not refresh the feed. But if you are going through a problem where Instagram can't refresh the feed and you want to know the reasons then read below:
1. Maybe you are using the old version app
2. Instagram doesn't allow any third-party apps so it can be the reason
3. Maybe your device is connected to the poor connection
4. Server Down of Instagram

More learn at: https://ai.wiki/read-blog/34783_what-are-the-reasons-that-instagram-can-039-t-refresh-feed.html