This morning, a few of my devices become unavailable.
A few ST open/close sensors but ive managed to get working again by removing battery ( i do this quite a lot actually, annoyingly )
But my Xiaomi motion sensors, a INNR bulb and an OSRAM bulb are unavailable. No idea what has happened but whats the best way to sort this. I really dont want to have to remove them all from various routines etc etc. 
Thanks for any help
Same here.
Never hurts to try rebooting your hub 
Yeah already rebooted hub.
So someone else has the same issue as well. Hmm
Maybe samsung did an update & didn’t say anything.
whos knows man. so annoying when these things happen
I agree…
Is there anything I can actually do to sort this?
Mine went offline a week ago. I had to repair everything. Don’t delete, just “add a thing” in ST and push the reset button on the devices every second or so until they’re discovered again.
That did the trick buddy. Thank you.