Thank you for your message!
I emailed you back but we can put the message here for everyone else’s benefit as well.
To clarify for my understanding, are you saying that only after a year, when there is a power cycle it drops from the network and previous power cycles would not experience this…or did you not have power cycles before? Has anything changed in the SmartThings hub firmware that you’re aware of?
Do you have the MAC address for that MLC, so I can check the firmware version you have…unless you can read the firmware version via SmartThings and let me know what that is.