I was moving some bitcoins to my Nano S. There was a new update to the Ledger Live app and I installed it. I wanted to check the Account Manager if there were any updates to my installed apps. After clicking on the Account Manager on Ledger Live my hardware wallet wiped itself clean! It just restarted, I never experienced it before. I thought that it got broken at first.
I disconnected and reconnected it again and it showed me the welcome screen you usually see the first time you set it up. Press both buttons to start the setup etc... I had to reconfigure it with my seed and set it up again. Very weird indeed.
I am not sure if this was a bug, some hardware failure or if it has anything to do with the update I performed.
this is a drawback to most hardware wallets. occasionally an update will wipe the device, although the readme for the update will mention this. my trezor had one update like that, and they gave plenty of warning 1st.
that being said you should always verify the seed before any update on anything. thats a given. bad cable, power glitch, whatever.. things happen.
i always put aside a bit of time before a hardware wallet update. usually goes fine but you never know.