For the past months I had random issues with devices dropping on a regular basis.
SmartThings sensors were the first ones to drop.
I was loosing faith in ST.
Then I realised that my Osram bulbs were causing other devices to drop.
I sold all of them and ST started working fine.
Last days I had a few issues with devices dropping.
Guess what…it was in the same day I replaced the battery in my Osram button (the last one from that brand).
So if you have Osram stuff throw them away…