I have been having the exact same issue you are describing. Failing install, cpu usage spikes. Have not gone into lower level as you have, but looks like same reaction. Is there any way to resolve this? Should I just shelve the idea of using Plex until a new version of FreeNAS or Plex comes out? I have a separate thread as I did not find this one. https://forums.plex.tv/t/freenas-plex-plugin-install-failing/598623
