Simple opaque transcoding demo GPU performance not captured by System Analyzer

Folks,

We've been trying to use System Analyzer to examine the performance of simple_transcode_opaque_async_vppresize demo. 

For some reason, however, the MFX Engine Usage percent shows almost no activity, and similar situation is with GPU overall usage.

Is there a reason (such as mismatch between the System Analyzer tool and API 1.3) for the inability to get the actual usage ? 

As a comparison point, we also run simple_2_decode demo, which showed the expected activity on both items (MFX Engine Usage/ GPU overall usage).

We use the Intel GPA Monitor 2013 R2 (13.2.200837)

Thanks,

Mamil