i am unable to do VNF nic Mappings

[LuciFer80-lab]

i am creating a pfsense vnf in cloudstack but when i select my networks later i am trying to map my nics to vnf but it is not allowing me to map it.......earlier it was working but now i am not able to do it ............anyone help??

[weizhouapache]

this is a regression if 4.22.1.0
fix: #13423