# Salesforce: Feature Service Disruption: Core Service

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2025-11-20 02:00 UTC · Resolved: 2025-11-20 18:16 UTC · Duration: 16 h
- Updates: 9 · Affected components: Core Service, 45 instances
- [Vendor status page: https://status.salesforce.com/incidents/20003474](https://status.salesforce.com/incidents/20003474)
- [Company: Salesforce](https://rewindex.com/company/salesforce.md)

## Timeline of updates

- **update** 2025-11-20 15:12 UTC: We are aware of an issue affecting customers while using the Field Service Lightning mobile application. Customers may experience difficulty syncing records and completing operations.  A recent release is the potential trigger of the issue, and we are evaluating if rolling back to the previous version will resolve the impact to customers. We will provide an update in the next 30 minutes or sooner.
- **update** 2025-11-20 15:53 UTC: We are continuing to investigate the issue affecting customers using the Field Service Lightning mobile application. The issue is believed to only affect Android users. If you are experiencing any sync failures, it is advised not to repeatedly attempt to sync as this will increase the volume of traffic. We are continuing to evaluate whether rolling back to the previous version will resolve the impact. We will provide an update in the next 30 minutes or sooner.
- **update** 2025-11-20 16:52 UTC: Our investigation is ongoing to validate whether a recent change is the potential cause of the issue. Our monitoring indicates a recent reduction in traffic around 15:15 UTC, which will allow some users to successfully sync records.  We will provide an update in the next 30 minutes or sooner.
- **update** 2025-11-20 17:34 UTC: We continue to investigate the recent change and are exploring all possible paths and workarounds to mitigate the sync errors occurring in the Field Service Lightning mobile application.  We will provide an update in the next 60 minutes or sooner.
- **update** 2025-11-20 18:31 UTC: We have identified a recent change to be the potential cause of the issue. Currently, we are working on rolling back that change to alleviate the impact.  We will provide an update in the next 60 minutes or sooner.
- **update** 2025-11-20 20:04 UTC: We have rolled back the recent change and are monitoring the environment for stability. Affected customers will need to restart their application in order to receive this fix. Users should follow the steps in this article to ensure the application is closed properly: http://sfdc.co/bOfcKD.  We will provide an update in the next 60 minutes or sooner if more information becomes available.
- **update** 2025-11-20 20:49 UTC: Initial monitoring is showing positive results. We will continue to observe the environment and will provide an update upon significant changes or if new information becomes available.
- **update** 2025-11-20 23:25 UTC: After a period of monitoring and testing, this issue is resolved as of November 20, at 22:43 UTC. Customers using Android devices can sync records and navigate the Field Service Lightning mobile application as intended. We will continue to monitor the environment to ensure stability and prevent a recurrence. We will thoroughly investigate the incident, confirming the technical trigger, the underlying cause, and preventive action to avoid a repeat in the future. We apologize for any inconvenience this issue may have caused you and your business.
- **update** 2025-12-03 18:42 UTC: The engineering team identified a proxy change as the root cause, which resulted in the temporary suspension of Lightning Web Security for all customers. A release was rolled out to all impacted instances, and the issue was fully resolved as of 18:16 UTC. Upon further investigation, we have determined that the start time of impact is different than initially understood. We have now revised the start time of the Trust post to more accurately reflect the time customers may have begun to experience the impact. We apologize for any confusion this may have caused. We will continue to monitor the environment to ensure stability and prevent a recurrence. We will thoroughly investigate the incident, confirming the technical trigger, the underlying cause, and preventive action to avoid a repeat in the future. We apologize for any inconvenience this issue may have caused you and your business.


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Canonical: https://rewindex.com/company/salesforce/incidents/20003474 · Markdown: https://rewindex.com/company/salesforce/incidents/20003474.md · JSON: https://rewindex.com/api/v1/companies/salesforce/incidents/20003474 · Generated 2026-10-18T10:26:16.590Z