Bug Report: CameraKit QR -there is a sudden, wobbly shift when changing to hands.

First... not sure where these should be.  If there's a bugtracker, I'll gladly use it because I haven't found a way around this one yet (save for keeping the controllers alive).

When using CameraKit to scan QR codes 

https://communityforums.atmeta.com/discussions/Questions_Discussions/bug-report-mruk-83-0-4---85-0-0-cameraaccess-getcamerapose-bad/1371408/

It's all fine and dandy with the above patch... until you put the controllers down.

Then, it seems to go off in a random, not flat direction that is not stable...

Unfortunately I haven't gotten actual MR screenshots to work, but here are logs.
HH = HandHeld.  This the last frame before I pick up a controller.
CC = ControllerControlled.  This is the first frame after I pick up a controller
CS = CameraStable.  IIRC 10 frames later when it's nice and flat.

I try to hold my head and the QR code still for these tests... you get a smidge in the UV space and a smidge in the camera pose... but the WC (world coords) are very very different.  When in controller mode, they're nice and consistent and reference the QR code nicely.  In handheld mode... they're neither stable nor nice.  Usually they're about in the same spot, but tilted at a really really weird angle.

Anybody know a good way to take a MR screenshot from code?