When you query a Microsoft SQL Server 2017 Analysis Services (SSAS) Tabular mode database, you may notice that for certain queries against the DirectQuery (DQ) mode some filters may be ignored unintentionally which produces unexpected results.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
This issue is fixed in the following cumulative update for SQL Server:
About cumulative updates for SQL Server:
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server: