New NAS, now it takes 3 mins for a movie to start

I recently upgraded from a home-rolled FreeBSD samba server behind ESXi v5.5 to a FreeNAS (also FreeBSD) NAS appliance behind ESXi v6.
To migrate to the new NAS, I changed IP addresses on the new FreeNAS appliance.
Now Kodi sees my library on the new NAS appliance.

When I go to start a movie from the new NAS, it takes upwards of 3 minutes before the video starts playing. If I play a TV episode, it starts quickly as expected.

Movies are generally in the 8-10GB range, episodes are ~1GB.

Not sure if there’s anything in the Kodi logs that points to why it would take so long for the video to start.

http://sprunge.us/BLBZ

Code:
20:58:43.680 T:140095865996480   DEBUG: OnPlayMedia smb://192.168.1.100/zpool0/media/movies/Dark Side of the Rainbow - The Wizard of Oz 1939 - Dark Side of the Moon 1973.mkv
......
21:01:55.775 T:140093134395136  NOTICE: Creating Demuxer
21:01:55.819 T:140093134395136   DEBUG: Open - probing detected format [matroska,webm]
21:01:55.881 T:140093134395136   DEBUG: Open - avformat_find_stream_info starting
21:01:55.894 T:140093134395136   DEBUG: Open - av_find_stream_info finished
21:01:55.894 T:140093134395136    INFO: ffmpeg[7F69F982D700]: Input #0, matroska,webm, smb://192.168.1.100/zpool0/media/movies/Dark Side of the Rainbow - The Wizard of Oz 1939 - Dark Side of the Moon 1973.mk':