Possible error when using Camera Focus tool in “Depth of Field” settings.

Possible error when using Camera Focus tool in “Depth of Field” settings.
We have this issue quiet frequently among other glitches while using 3D functions.

I have uploaded a video explaining the issue and also included a PSD file:
(REMOVED)

If you could, please let me know when the files have been downloaded so I can remove them off the server.

Thanks
Mark