Interesting, kodi-autostart.service seems to be pulled in by kodi.service, not kodi.target (which is a bit unusual...).
To get it back with kodi.service mask the following command should to the trick:
For filesystem mounts it's better though to use mount units, see eg the nfs/cifs mount samples in .config/system.d and the mount unit documentation systemd.mount
If this filesystem is used for tvheadend recordings I strongly recommend ordering the mount unit before service.tvheadend42.service so the filesystem will be mounted before tvheadend is started.
so long,
Hias