If running OVX conformance test from boot, everything passes.  However, if running conformance test after running a camera demo, the following tests fail:

[ ======== ]
[ ALL DONE ] 119 test(s) from 1 test case(s) ran
[ PASSED ] 107 test(s)
[ FAILED ] 12 test(s), listed below:
[ FAILED ] tivxHwaVpacViss.GraphProcessingFileDcc/0/cksm/dcc=off/2a=NULL/glbce=on/nsf4=on
[ FAILED ] tivxHwaVpacViss.GraphProcessingFileDcc/1/cksm/dcc=off/2a=NULL/glbce=on/nsf4=bypass
[ FAILED ] tivxHwaVpacViss.GraphProcessingFileDcc/2/cksm/dcc=off/2a=NULL/glbce=bypass/nsf4=on
[ FAILED ] tivxHwaVpacViss.GraphProcessingFileDcc/3/cksm/dcc=off/2a=NULL/glbce=bypass/nsf4=bypass
[ FAILED ] tivxHwaVpacViss.GraphProcessingFileDcc/12/cksm/dcc=imx390/2a=NULL/glbce=on/nsf4=on
[ FAILED ] tivxHwaVpacViss.GraphProcessingFileDcc/13/cksm/dcc=imx390/2a=NULL/glbce=on/nsf4=bypass
[ FAILED ] tivxHwaVpacViss.GraphProcessingFileDcc/14/cksm/dcc=imx390/2a=NULL/glbce=bypass/nsf4=on
[ FAILED ] tivxHwaVpacViss.GraphProcessingFileDcc/15/cksm/dcc=imx390/2a=NULL/glbce=bypass/nsf4=bypass
[ FAILED ] tivxHwaVpacViss.GraphProcessingFileDcc/24/cksm/dcc=ar0233/2a=NULL/glbce=on/nsf4=on
[ FAILED ] tivxHwaVpacViss.GraphProcessingFileDcc/25/cksm/dcc=ar0233/2a=NULL/glbce=on/nsf4=bypass
[ FAILED ] tivxHwaVpacViss.GraphProcessingFileDcc/26/cksm/dcc=ar0233/2a=NULL/glbce=bypass/nsf4=on
[ FAILED ] tivxHwaVpacViss.GraphProcessingFileDcc/27/cksm/dcc=ar0233/2a=NULL/glbce=bypass/nsf4=bypass
[ DISABLED ] 0 test(s)

When 2a is set to NULL, the node refers to an internal 2a global data structure populated by the 2A node.  My suspicion is that upon boot, this is initialized to 0s or something, but after running a camera demo, these have been updated.  Need to see how this can be reinitialized upon creation of VISS nodes.