Symptoms
In Microsoft SQL Server 2019, the built-in SESSION_CONTEXT that's used in parallel plans returns wrong results.
Resolution
This problem is fixed in the following cumulative update for SQL Server:
Cumulative Update 14 for SQL Server 2019
About cumulative updates for SQL Server
Each new cumulative update for SQL Server contains all the hotfixes and security fixes that were in the previous build. We recommend that you install the latest build for your version of SQL Server:
Latest cumulative update for SQL Server 2019
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminology that Microsoft uses to describe software updates.