Yeah I doubt it’s software corruption, but I appreciate the report nonetheless. Sounds like its a moot thing to argue over as you’ve already re-imaged the card.
I’m not surprised the re-install didn’t connect up with the old Pi entry on your account, we probably just see it as a new machine with a new OS install so I’d go ahead and remove that one from your dashboard.
So if I’m understanding correctly, you have a new Pi entry in your cayenne dashboard showing as ‘offline’. Toss me a screenshot if I’m misunderstanding. It must have been online for at least a bit for it to even show up in the dashboard as anything other than a grey ‘pending’ device.
I’d start with a sanity reboot of the Pi, then the troubleshooting steps that @adam so helpfully wrote for this sort of scenario: Troubleshooting Pi Showing Up as Offline in Dashboard