Hello Arvind,
did you find a solution to the problem?
I am facing a similar issue where GRACFFLOG has multiple entries for the flag WORKFLOW_SENT != 'X' and so they do not appear in the 'Search Requests' section of Access Management work center.
But the FF checkout instances are showing up in 'FF Log summary report' and you don't find the corresponding instances in 'Search Requests'.
Thanks,
Pawan.