I was doing an advanced setup with Electrum, and at the point when you're supposed to unplug and plug it into an offline computer with text editor to backup the seed, it just got stuck and was never again detected by the computer. Tried everything, Ledger starter, firmware update, etc. nothing can detect it anymore. In all fairness, most users will setup their Ledger (user chooses PIN and writes down mnemonics, then send seed to the device) with the Ledger Starter ISO, but that only allows a 4-digit pin. Doing initial setup with Electrum allows for more secure PIN, but I guess it might possibly break your nano.