Okay, I’ve tried to run the Dangerous NFC app on another NTAG 216 tag (a card I bought from KSEC) with another phone from another brand, and it fucked up that card too (i.e. “Transceive failed” and now the card won’t answer PWD_AUTH anymore).
Only this time, I did it on the Proxmark3. So I have a trace of the fucked up transaction, if anybody’s interested.
This app is seriously unsafe 