VR Reverb G2 WMR Performance (Motion Reprojection CPU issues, overclocking)

I managed to reproduce this issue consistently, but I don’t have a root cause.
@mbucchia I’d really appreciate if you take a look and guide towards solution/ways to debug.
Problem:
When I start VR (hp g2 wmr) with MR on I can see fps drops every constant intervals. You can see it in the attached image.
Workaround:
Change the application while i-n VR. Meaning, go to another application and perform some task. e.g. go to Task Monitor and change the MSFS priority from normal to high and back - Doesn’t matter.
Go back MSFS the fps are locked nicely at 30 fps and it is butter smooth.

Can any one reproduce my issue and workaround above?
Thanks