Instagram story scraper silently skips stories the account already viewed

Opening instagram.com/stories/<user>/ in a logged-in browser starts playback at the first UNSEEN story, not the first story in the tray. If the same account watches stories on a phone (or the scraper moved to the user's main browser profile), the scraper only captures the tail and misses everything already viewed, with no error. Evidence is in the screenshot: the progress bar has many segments already full on the first captured frame. Fix: navigate back to the first segment (or count segments and step left) before capturing, and log why the capture loop stops.