Assume that you use the Dynamic Management Functions (DMF)sys.dm_exec_query_statistics_xml in Microsoft SQL Server 2016 and 2017. When the querythat is executed in the targeted session ID is already complete and the DMF tries to retrieve the query execution plan at the same time, an assertionerror occurs.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
The issue is fixed in the following cumulative updates for SQL Server:
About cumulative updates for SQL Server: