Cortex API 2.27.1 (R3.3.5)

During the staged rollout of Cortex 2.27.0, an issue was uncovered. No production studies were impacted. The issue was addressed in an updated patch for Cortex 2.27.1. The release schedule now reflects the rollout of the updated release.

Release Schedule

Environment	Region	Date	Maintenance window
Development	US, EU, CN	January 13, 2025	12:00 UTC - 16:00 UTC
Development (Updated)	US, EU, CN	January 23, 2025	14:00 UTC - 18:00 UTC
Production	US, EU, CN	January 30, 2025	12:00 UTC - 16:00 UTC

Updates

• Cortex API: Change from 2.26.2 to to 2.27.1

This release is a planned upgrade that has been deployed for all existing and upcoming studies. We do not expect there to be any downtime associated with this update.

This upgrade contains updates to back-end services that do not impact the end user experience. All back-end services are tested and validated in accordance with our standard operating procedures before being deployed. There is no GxP risk. No additional testing, training, or documentation is needed for this upgrade.

Fixed Issues

Key	Impacted End-User Application	Summary	Fixed Issue Summary
CTXAPI-3018	Patient App Android, Patient App iOS, Patient App Web, Site App iOS, Site App Web	i18n assets are being duplicated on every deployment	When a study is deployed more than once into the same org, the correct version of the translations will be shown for an activity.