Corona VFB Camera to Camera freeze.

VFB Camera1 to Camera2 freezes…

The display remains froze.
But, If I go hit perspective mode and click on model, the display will then refresh.

I have been having a similar issue lately with physical cameras not refreshing in the viewport.

I brought them into a fresh max file and it started working again fine. It’s all very strange.

Not sure if my issue is related, but there it is…

I am not sure what this request is about, but maybe it has something to do with the little lock icon which is mentioned at the far bottom of this article?
https://coronarenderer.freshdesk.com/support/solutions/articles/5000520620