关于Instagram Business API中follower_count指标返回值不符定义的问询

I recently ran into a confusing issue when working with the Facebook Graph API's Instagram Business Accounts insights endpoint, specifically around the follower_count metric with a day period. Here's what I found:

• Metric definition mismatch: When calling the endpoint your_instagram_business_account/insights?metric=follower_count&period=day, the official documentation states this metric represents "the total number of unique users who follow the business account". However, the actual response returns the daily net new follower count (not the total follower count as described).
• Unfollower data not reflected correctly: This metric also fails to account for unfollows in a way that matches the documentation. For example, if your account gains 2 new followers but loses 2 followers in a single day, the returned follower_count value will be 0—this makes it clear it's calculating net changes rather than reporting the total follower count.

This appears to be a bug in how the metric is implemented versus how it's documented, which can cause issues for anyone building analytics tools or reporting workflows that depend on accurate follower data.

内容的提问来源于stack exchange，提问作者Tomasz Garboliński