Having difficulty setting up a second linux bridge vmbr1 (solved, had to clear virtual mac)

[RobGranger]

I have 4 nics in my system, two onboard of the HP Z4 that have bugs and hang under high use. I have added 2 via PCIe card.
I have created a 2nd bridge vmbr1 and assigned one of the new ports enps30f1 as a port to the vmbr1 bridge I don't have an IP address here as I am still doing management through vmbr0. If I take a dummy vm and move it to the vmbr1 bridge I loose network. if I move it back it works.
eno1 is one of the onboard integrated Nics.

enp3s0f1 and enp3s0f0 are the new intel NICs that aren't supposed to not hang.

I had assumed that just flipping vmbr0 to vmbr1 would work?
Thanks in advance!
Rob

cat 500.conf
agent: 1
boot: order=scsi0;ide2;net0
cores: 2
ide2: none,media=cdrom
memory: 4096
meta: creation-qemu=7.2.0,ctime=1700786949
net0: virtio=9A:F0:E6:02:07:D4,bridge=vmbr0
numa: 0
ostype: l26
scsi0: PMbackup:500/vm-500-disk-0.qcow2,iothread=1,size=50G
scsihw: virtio-scsi-single
smbios1: uuid=c9f7d6d6-0e87-4dc4-a380-8f0b86f6ff8c
sockets: 1
vmgenid: 1ee18009-bf02-4997-a1be-8b45ff1f0efd

auto lo
iface lo inet loopback

auto eno1
iface eno1 inet manual
    post-up /usr/sbin/ethtool -K $IFACE tso off gro off gso off

iface eno2 inet manual

auto enp3s0f0
iface enp3s0f0 inet manual

auto enp3s0f1
iface enp3s0f1 inet manual

auto vmbr0
iface vmbr0 inet static
    address 10.20.0.50/24
    gateway 10.20.0.1
    bridge-ports eno1
    bridge-stp off
    bridge-fd 0
    post-up /usr/sbin/ethtool -K $IFACE tso off gro off gso off

auto vmbr1
iface vmbr1 inet manual
    bridge-ports enp3s0f1
    bridge-stp off
    bridge-fd 0
    post-up /usr/sbin/ethtool -K $IFACE tso off gro off gso off

 

[RobGranger]

I could be a DA, I wiped out the MAC address in the vmbr1 config and it is working, really, is that it? We seem to be missing a "slam my head" emoji

Was it an arp cache somewhere?