Something big is coming! (June 2021 app update)

Apps & Clients SmartThings (Samsung Connect)
214
  1. your devive MUST NOT use a custom device handler.
  2. your device handler MUST be one of the Samsung provided defaults that is marked to load locally in the hub.
  3. That device handler must ACTUALLY be in the hub firmware - rare if 1 and 2 are true but it has happened)
  4. The item you’re trying to automate must be one of a certian set of actions, on-off, level, react to location mode / sunrise/sunset i can’t remember the exact list - but basically your automation can’t have custom actions, or triggering scenes, or any action that would REQUIRE cloud connectivity like sending a notification.

So exactly what are you attempting and with what device?