I hope this is the right place for this.
I have noticed that when running the Elechouse PN532 in SPI mode (and using the libraries in this site) with any other SPI devices, that when NFC.begin() is called the other SPI devices do not run even if the hardware lines (MOSI etc.) on the PN532 are disconnected. Just the call to nfc.begin() is enough to lock up the SPI.
Has anyone seen this?