Network bridge help - fedora 31 broke things!

[Tom Horsley]

I have all NetworkManager services masked out.
I have network-scripts installed and network enabled.
I have these files in /etc/sysconfig/network-scripts:

ifcfg-p6p1 looks like:

NM_CONTROLLED="no"
DHCPV6C="no"
DEVICE="p6p1"
ONBOOT="yes"
PEERDNS="no"
HWADDR="00:0B:0E:0F:00:ED"
BRIDGE=br0

ifcfg-br0 looks like:

NM_CONTROLLED="no"
DHCPV6C="no"
BOOTPROTO="dhcp"
DEVICE="br0"
ONBOOT="yes"
PEERDNS="no"
TYPE=Bridge

On fedora 30, br0 automagically shows up with the same
MAC as p6p1.

On fedora 31, br0 gets the wacky MAC address:
26:b0:0b:12:b4:6c

The corporate DHCP service then thinks I have a different
hardware and gives me the wrong IP address which doesn't
lead to my hostname.

Anyone know what is going on?