espressobin some switch ports only receiving broadcasts

I am trying to use each Espressobin network port as a independent network interface ( each connected to separate a network). Using systemd.networkd configuration. I have linux systems connected to each port and only one of the ports (lan0) receives anything but broadcast packets. All ports were monitored with tcpdump on both ends. Espressobin board (V5) sends ARP requests on all ports but only hears reply on lan0 . The MAC address for eth0 is different from each interface MAC address. Although replies to other ports are sent with the correct MAC address for that port, the reply seems to be filtered/dropped and not received, However the port does receive broadcast packets. This may be related/similar to:

Network config files:

/etc/systemd/network/10-eth0.network
[Match]
Name=eth0

[Network]
DHCP=no

/etc/systemd/network/20-wan.network
[Match]
Name=wan

[Link]
MACAddress=f0:ad:4e:03:64:82

[Network]
Address=192.168.1.131/24
Gateway=192.168.1.1

/etc/systemd/network/30-lan0.network
[Match]
Name=lan0

[Link]
MACAddress=f0:ad:4e:03:64:80

[Network]
DHCP=no
BindCarrier=eth0
Address=172.17.49.2/24

/etc/systemd/network/40-lan1.network
[Match]
Name=lan1

[Link]
MACAddress=f0:ad:4e:03:64:81

[Network]
DHCP=no
BindCarrier=eth0
Address=10.0.49.70/24
Gateway=10.0.49.1
DNS=10.0.49.1