Antwort auf: KeepKey Pin funktioniert nicht
With the current fud around keepkey not responding, could you at least verify that your funds did not move? Not being able to restore from the 12 words backup + passphrase in Mycelium worries me a lot as that is what I would ultimately rely on.
Do you see a transaction history? Is the receiving address your first ever address? What magic is going on here?
Finally there remains the chance of BIP39 not being implemented correctly like bitcore had it several times up to recently, with the last manifestation of this being that one in 100 backups restored a non-BIP39 wallet.
Crossing fingers that you get to the bottom of this quickly.