Hi. I’m having similar issues. Bought 2 Salus SP600 plugs a couple of weeks back just after I bought my hub (v3). First plug paired fine then, but when I came to use second one today I have a similar experience to the one described above, i.e. from the device light it seems to pair, I have a zbjoin event, but nothing shows up in the app or web device list. Looks like someone else is having this experience too: Can't connect zigbee on of switch. Please let me know if you resolve this! (Note: I’m very new to SmartThings, so could be missing something obvious, but have already spent a few hours today searching through the forums for an answer!)