# Cortex API 2.28.3 (R3.4.6) ## Release Schedule **Cortex**
EnvironmentRegionDateMaintenance window
DevelopmentUS, EU, CNApril 09, 202516:00 UTC - 20:00 UTC
ProductionUS, EU, CNUpcoming April 14, 202512:00 UTC - 16:00 UTC
### Updates The following applications have been updated as part of this maintenance release. While some changes may result in resolved issues for end users, others may not have a direct impact on the user interface or functionality. * **Cortex:** Change from 2.28.1 to 2.28.3 Additionally, this release may include updates to back-end services, which have no effect on the user experience. All updates, including back-end services, have been tested and validated in accordance with our standard operating procedures. ### Fixed Issues | Issue Key | Impacted End-User Applications | Summary | Fixed Issue Summary | | ----------- | ------------------------------ | --------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | CTXAPI-3091 | Patient App Web | Updating an environment to a new study version does not apply changes made to an activity's end availability condition in that version. | Updating an environment to a new study version now correctly applies changes made to an activity's end availability condition in that version. | | CTXAPI-3149 | App Dashboard | Existing roles are removed from studio environments | Users logging into Studio organizations now retain their assigned roles. Roles granted within the organization, such as those assigned by an organization owner, no longer are removed during sign in. |