“Cannot continue the execution because the session is in the kill state” Error?
Solution
The solution to your issue is contained in the error message you included in your question:

2020-09-21 12:23:39.73 Server      A user request from the session with SPID 697 
                                   generated a fatal exception. SQL Server is 
                                   terminating this session. 
                                   Contact Product Support Services with the dump 
                                   produced in the log directory.


Make sure you can collect the ***Stack Dump being sent to C:\Program Files\Microsoft SQL Server\MSSQL15.MSSQLSERVER\MSSQL\LOG\SQLDump10000.txt file and open up a service request with (your) Microsoft (representative/consultant). In some cases you might find a minidump *.dmp file located in the same location.
Include everything in the case and hopefully Microsoft will be able provide you with a solution to your issues.
Recommendation (On a Side Note)
I noticed that the log files are generated in the C:\ drive. Normally this drives hosts the Operating System (OS). It isn't recommended to run SQL Server on the OS drive. If the database or anything related to the database produces a large amount of data, then this could fill up the OS drive, which eventually could crash the system.