By default, our plugin queries Instagram every hour to grab new photos. The cache is required for better plugin performance. So new images will be displayed in the feed after the cache expires (1 hour).
You can change the cache time value on the plugin Preferences page, in the Cache time field in API Settings (Advanced) section. Just replace the “3600” with the desired caching time (in seconds). Keep in mind that it influences the plugin loading speed. We don’t recommend to set it to less than 1800 seconds.