How are you moving the camera? Directly interacting with the camera viewports, or using the camera object handlers for another perspective view or using the camera node parameters? Really it's hard to figure why something like that could happen, especially with the camera update, that is a very simple operation.
I'm going to make more tests to see if I can see something like that here. One good test to see if the problem can be related to the Houdini OpenGL viewports (somehow interacting with the Octane rendering) could be to close all the Houdini viewports and change the camera transformations directly using the camera node parameters.
Thanks,
-Juanjo