I suspect that the chip used is not officially released,I have encountered such a situation on the mk10 chip.
Hi thoomanwang,
Please see datasheet, page 8,
https://www.nxp.com.cn/docs/en/nxp/data-sheets/LPC55S1x_LPC551x_DS.pdf
you will see
I don't have a LPC5514JBD64 in my hand now, but I just took a photo for LPC55S06JBD64, you will see pin 1 is labbled on the board. This is the same as LPC5514JBD64.
Thanks,
Jun Zhang