THANK YOU VERY VERY MUCH for you post.
This help me !!!!
Multiple mounth that i have this problem.
And now its resoleved.

For Openelec :
1. Enable SSH with interface.
2. Connecte so ssh. Root and pass openelec
3. mkdir /storage/videos/torrents
4. vi /storage/.config/system.d/storage-videos-torrents.mount
5. add :
#######################
[Unit]
Description=torrent nfs mount
Requires=network-online.service
After=network-online.service
Before=kodi.service
[Mount]
What=your-server.net:/path/
Where=/storage/videos/torrents
Options=udp,noatime,rsize=32768,wsize=32768,nolock,nfsvers=3
Type=nff
[Install]
WantedBy=multi-user.target
#######################
6. systemctl enable storage-videos-torrents.mount
7. Reboot you raspberry
8. Connect SSH abd verify : ls /storage/videos/torrents
9. Disables SSH from interface.
10. From interface go to videos and add torrent directory (add videos sources -> local storage > videos > torrents).

You can watch all films without problem ;)
Enjoy

Ali