How to set PXE binary file name correctly?

[dims]

I am trying to load lpxelinux.0 instead of pxelinux.0 in pfSense, and configured it in default bios filename setting:

Unfortunately, server still sends pxelinux.0 as a filename:

How to fix?

How to check configuration in pfSense console?

Restarting DHCP server didn't help. Setting this name in all three settings also didn't help.