freebsd stable - Dec 2018 - pxeboot stuck

Hi,
today?s latest 11.2 rev 341671, when booting off local disk all is fine, but
pxeboot gets stuck after printing
	FreeBSD/x86 bootstrap loader. Revision 1.1
	(Fri Dec  7 09:45:34 IST 2018 danny-pe-44)
        -

older pxeboot get slightly further, but hang too.

older root images  work fine

so what magic is now needed?

thanks,
	danny