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Salesforce: Performance Degradation: Core Service

Affected components: Core Service334 instances

Timeline of updates

1. update2025-10-23 03:44 UTC

   At 01:47 UTC on October 23, 2025, a performance degradation began affecting Salesforce sandbox copy functionality following the deployment of patch Winter '26 Patch 9. Customers attempting to initiate sandbox copies may experience failures or stuck operations. We have identified the root cause, halted the patch rollout, and are implementing a rollback to restore normal sandbox operations. We'll provide an update in 60 minutes or sooner if additional information becomes available.

2. update2025-10-23 04:15 UTC

   We have completed validation testing in the lower environment and confirmed that rollback procedures successfully restore normal sandbox operations. We are now implementing rollback procedures across affected sandbox instances. Customers may continue to experience failures when attempting sandbox copy operations until the rollback is complete for their specific instances. We'll provide an update in 30 minutes or sooner if additional information becomes available.

3. update2025-10-23 04:47 UTC

   We are actively monitoring the rollback progress. Customers may continue to encounter sandbox copy failures until the rollback completes on their specific instance. Normal operations will resume once the rollback is complete across instances. We’ll provide an update when service is fully restored.

4. update2025-10-23 06:05 UTC

   Further investigation confirms that the incident commenced at 22:00 UTC on 22 October 2025. This supersedes the previously communicated start time and is now updated.

5. update2025-10-23 07:50 UTC

   The rollback is in its final stage and continues to progress smoothly. Once it’s complete, we’ll validate and verify the environment to confirm everything is functioning as expected. We’ll share an update once the rollback is complete.

6. update2025-10-23 09:06 UTC

   The rollback completed successfully, and the services are restored as of 09:01 UTC. Instance stability and performance have returned to expected levels, and we have declared the incident resolved. If any of your jobs are still pending or stagnant, please restart your sandbox to ensure they finish successfully. We apologize for how you and your business may have been affected by this incident.

Impact, status and times are the vendor’s own, as last archived. View on status.salesforce.com (opens in new tab). Salesforce profile · Recent Salesforce incidents · Markdown · JSON