I have tried everything to prevent my aircraft from sliding off the deck of the ship. They are a combination of Lightwave based clones and Lightwave instances. I have turned OFF the Octane Instancing of NULLs and CLONEs in Render Target too. Often this fixes the issue. Yet as we can hilariously see, it persists. The only thing I have not done yet is turn off the very handy Multi Threaded Scene Extraction. I am about to do this now. This issue only shows up when I do LWSN or F10 renders. IPR and F9 does not have this issue.