OpenBSD: Message

Hey everybody,

I'm experiencing problems with CARP after upgrading to 6.3, it was working
fine between my two servers in 6.2 but after upgrading (first backup and
then master) I have a ping package loss on about 20%.

It seem like the backup server tries to take the master, cause it's the
only one changing the states. When it changes state the symptoms is:
one package is dropped (ping), and it switches back to backup. I haven't
changed anything, carp-config or PF, except the upgrade to 6.3.

It works if i shutdown the master, then Backup takes over fine and gives
back to master when it gets up, but when it's just running in backup, it
switches back and fourth.

I have tried tcpdumping and looking at my pfsync0 but I can't find the
problem. I have tried to write my CARP settings again in hostname.carp*
on both servers, check if pfsync0 is on the same interface and IP-range
on both servers, checked my PF and everything, but can't find the problem...

It does it across all 6 CARP's, so it looks like it's missing a hardbeat
or something once in a while.

I also tried switching from multicast to unicast, in case my ISP (running
Juniper equipment) have activated something on the WAN side, but it didn't
change my experience - but since it also happens on my LAN I didn't really
expect this to be the problem.

# Server 1
My /etc/hostname.* for CARP's and pfsync + host adaptor:
https://pastebin.com/vrtuPqnQ
My /etc/pf.conf: https://pastebin.com/yhVkG4x4

# Server 2
My /etc/hostname.* for CARP's and pfsync + host adaptor:
https://pastebin.com/a7fuM923
My /etc/pf.conf: https://pastebin.com/xNr1TtZ7

Any help or pointers would be fantastic.
I have struggled with this for a week now and I'm running out of idears -
the only solution I have right now is turning off the backup server.

$ uname -a
OpenBSD BSD-firewall01.semarkit.net 6.3 GENERIC.MP#107 amd64

Both servers is running on a KVM host running Debian Stretch with ZFS-for-
Linux and they haven't been touched either since it got installed, neither
before, under or after the problems started.

em0 is passed through the host and running all the VLAN and CARP things,
while em1 (pfsync0) is a crossed connection between the two host servers
not connected to the outside world or switch.

If you need any other information on anything in the setup, please feel
free to ask, I'm really annoyed by this, since it has worked and now it
don't, and I can't figure out why or what I have missed.

The only thing I haven't tried yet is to install a couple of new server
and reproduce the problem.

Sorry for a really long post!