There is a customized VS which is retuning a META match based on the code in Match Script in DevTest 10.6. After upgrading to DevTest 10.8.1, the META transaction is not matching and VS returning a No Match Found.
Service Virtualization 10.8.1
Script match was ignored for META match transactions and caused the issue.
If anyone facing the similar issue, support has a patch. Please open a support case and refer DE634838.