Duolingo experienced a major incident on September 13, 2025 affecting Duolingo, lasting 1h 18m. The incident has been resolved; the full update timeline is below.
Affected components
Duolingo
Update timeline
- investigating Sep 13, 2025, 07:27 PM UTC
We are aware of an issue causing some learners’ streaks to appear reset or display incorrectly. Our team is actively investigating the cause and working to restore affected streaks.
- monitoring Sep 13, 2025, 08:40 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Sep 13, 2025, 08:46 PM UTC
This incident has been resolved.