If Bridgy were to always truncate IG permalink URLs at 11 characters, it would be able to compare previously private photos with public syndication and vice versa.
Useful for when someone had private photos for a while, then switched to public, and used shorter permalinks - this would allow them to get Bridgy backfeed on their newly public photos.
Instagram permalinks are different lengths depending on if the photo was posted while the account was public or private!
E.g. this photo was posted when the account was private: https://www.instagram.com/p/BDCv87dA9R_ibz5dUgymJjtGo2XiKl7o42gCQc0/ However, it's public permalink is actually just the first 11 characters of the ID, i.e.: https://www.instagram.com/p/BDCv87dA9R_
If Bridgy were to always truncate IG permalink URLs at 11 characters, it would be able to compare previously private photos with public syndication and vice versa.
Useful for when someone had private photos for a while, then switched to public, and used shorter permalinks - this would allow them to get Bridgy backfeed on their newly public photos.