That could be the case but it decoded the private key just fine until now. Sure, I can access my btc in a different manner but I like my nfc chip wallet

Just to clarify... you have your BIP38 (aka "encrypted" private key) stored on an NFC chip... and you used to be able to scan it using Mycelium, enter your passphrase and then Mycelium would decode it and then add the private key to your wallet?

I've stored the BIP38 encrypted key on a chip implant under my skin

So whenever I want to spent some funds I transfer some to Mycelium from the chip out of my hand.
But thank you very much for the double check.