Out of curiosity - in the last couple of weeks I had set up 4 widgets on my iPhone 6 on the home page. Today I went to arm my system with the widgets and they were gone. There was a Smartthings banner and when I clicked on it it said Manage Widgets with Smartthings and took me to the Routines page. This is not a problem, but it seems that every day things are changing and we are not getting notices about the changes.
This is a common complaint and a flaw in their design of widgets and Apple Watch shortcuts. Occasionally, it loses its settings after being logged out and you have to turn them back on. Perhaps this is more of a bug.