When a Letterboxd password goes stale, the plugin no longer retries the login forever. After three consecutive failed logins, syncing for that account pauses itself: no more login attempts (protecting you from Letterboxd rate limiting), a warning appears in Jellyfin's activity log where admins actually look, and the account card in both dashboards shows a "login failing" badge with the date it started. Re-save the account's credentials and syncing resumes on the next run; watches from the paused period are picked up by the scheduled catch-up, so nothing is lost.