Like some other users, I encountered this issue : [slm] Snapshots are just ignored when scheduled, but manual _execute works - #5 by stouch
Even if it can look like a dummy issue, I think it would be nice to get the _slm/status status information somewhere in the Snaphot Managment page of Kibana (<kibana_url>/app/management/data/snapshot_restore/snapshots).
Right now, when your slm status is STOPPED, nothing alerts you. Or maybe i missed it ?