Dhcpd isn't checking correct architecture for UEFI 64bit network boot (bug)
pfSense has several configuration options in the DHCP Server for Network Booting. The options allow you to specify filenames for the default bios, UEFI 32bit, and UEFI 64bit files. However, the dhcpd.conf generated only checks "option arch 00:07" for UEFI 64bit and it should also add 00:09.
I've filed a bug report with more details: https://redmine.pfsense.org/issues/5046
Before this gets fixed, is it possible for me to fix this locally? It looks like dhcpd.conf gets regenerated every time the dhcp server is restarted.