Are you sure it's not? It's pre-installed on some and not on others... It's just a suggestion from my own personal experiences with Samsung devices...Do you have any Assistant turned on? I would suggest using Quimby Assistant- only because it is samsung's Assistant for Galaxy and (I wish they would use a different icon for it because it freaks me out--if you don't already know, it is an eyeball) The Assistant should be able to deactivate the alarm...another suggestion but if it keeps happening, call product support at samsung.
The SmartThings app sets automations for IoT devices. It really has nothing to do with this. More likely it could be a bug with the "Modes and Routines" app, but I need to emphasize that I've changed nothing with my sleep schedule nor any of my routines. Ergo any behavioral change like this should be treated as a regression by Samsung's developers unless this is somehow "expected behavior".
It's the syncing of the alarms from the watch back to the phone. Make sure the alarm is toggled off on the watch and disabled in sleep settings. This stopped the alarm from being set for me for two mornings in a row now.
Same issue, I have sleep mode scheduled to 22:30 - 06:30 with disabled alarm but every 2–3 days it enables it without my action. The issue was probably introduced with January updated.
