Fedora 31 Network Strangeness

[Steve Dickson]

Hello,

I've recently updated my laptop to F31. Then I was no longer
able to ssh into it. After a little debugging... it turns
out my laptop was not getting the expected ip address 
from DHCP. The reason for that was the MAC address it was
sending to dhcpd had change!!! Looking at the interfaces 

bridge0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.31.1.175  netmask 255.255.0.0  broadcast 172.31.255.255
        inet6 fe80::98f9:f0d0:4b79:cdaa  prefixlen 64  scopeid 0x20<link>
        ether 3a:00:66:8a:dd:b9  txqueuelen 1000  (Ethernet)
        RX packets 259601  bytes 112149182 (106.9 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 256704  bytes 39319273 (37.4 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp0s31f6: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 8c:16:45:fe:c1:f1  txqueuelen 1000  (Ethernet)
        RX packets 355186  bytes 134328851 (128.1 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 256743  bytes 40395059 (38.5 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 16  memory 0xec200000-ec220000  

The bridge0 interface has as different MAC that the enp0s31f6 interface.
How can that be?? Esp when the hardware address (HWADDR=8C:16:45:FE:C1:F1)
is set in the ifcfg-bridge0_slave_1.

What has changed and where is the bridge MAC address coming from???

tia,

steved.