SQL Server Trace Flag 3688 is not working on SQL 2014?

As we are using some third party tools that fills up SQL logs with entries like :

SQL Trace ID 1 was started by login "sa". SQL Trace ID 2 was started by login "XX\xxxxx". SQL Trace stopped. Trace ID = '2'. Login Name = 'XX\xxxxx'. SQL Trace ID 2 was started by login "XX\xxxxx".

So I am trying to suppress these Trace information by enabling TF 3688 but it is not working on SQL 2014, SQL 2012 and SQL 2008R2 Below I am giving snapshot of all the configuration..Please let me know if I am missing anything.

After setting this, I have restarted SQL instance and verified that Trace is running fine by DBCC TRACESTATUS command:

After everything is set, still now log is getting filled with all these Trace related logs.

Please Help !!

Thanks in Advance, Subhro Saha