That's an off command (or at least one the app's logs report that it is sending), not an off event, which would normally come in response from the device that its state has changed. Your logs suggest there was never actually an event, though only events would say for sure (but it appears you have device descriptionText logging on that should print the same).
There are two things I'd try first, in no particular order:
- Go to the device detail page for device 1575, look at the "Events" page for it, and see if you see an entry with type "command" and name "off" around 12:22:37. This would confirm that RL sent the command, as its logs say. Note that you are looking specifically for commands, not events.
- Also on the device detail page for device 1575, try the "Off" command yourself and see if it actually works (of course, you will likely need it on first). If not, you've got other problems, but at least you know why RL doesn't seem to be working.
Knowing that would give you a better idea of where to start.