Incident with Pull Requests

Update timeline

1. investigating Apr 23, 2026, 07:50 PM UTC

   We are investigating reports of degraded performance for Pull Requests

2. investigating Apr 23, 2026, 07:58 PM UTC

   We have identified a regression in merge queue behavior present when squash merging or rebasing. We have identified the root-cause and are in the process of reverting the change.

3. investigating Apr 23, 2026, 08:47 PM UTC

   Pull Requests is operating normally.

4. investigating Apr 23, 2026, 09:18 PM UTC

   We have resolved a regression present when using merge queue with either squash merges or rebases. If you use merge queue in this configuration, some pull requests may have been merged incorrectly between 2026-04-23 16:05-20:43 UTC. This behavior is still present in GitHub Enterprise Cloud with Data Residency, and we are rolling out the same fix.

5. resolved Apr 23, 2026, 09:43 PM UTC

   This incident has been resolved and we've contacted repository administrators via email who have impacted branches. Thank you for your patience and understanding as we addressed this issue. A detailed root cause analysis will also be shared as soon as it is available.