@Dennis_Tegenbosch just an update. SmartThings does have a platform issue that is causing problems with a lot of device handlers. SmartThings staff have identified the issue but have not mentioned an ETA on a fix.
Update: After a lot more testing, the initial issue I explained below always existed, but manually applying the response command to each item in the list didn’t always work either so I think there’s a larger issue with the way the parse result is being handled.
The one thing I do know is that if you use sendHubCommand and sendEvent instead of returning items from the parse method, everything will work the way it’s supposed to…
A few days ago most of my devices started reporting that they were offline and I tracked the problem down to SmartThings ignoring the events being returned from the WakeUpNotification event handler.
I ended up changing all of my device handlers to use sendEvent instead of using createEvent and that solved the problem, but it didn’t explain why it was only effecti…