Latest -current boots very slow in VM

Hi All,

Just updated one of my -current test VMs to the snapshot of June 30.
The boot process takes extremely long. As soon as it's booting:

###
Using drive 0, partition 3.
Loading......
probing: pc0 com0 mem[638K 3838M 4352M a20=on]
disk: hd0+
>> OpenBSD/amd64 BOOT 3.53
\
com0: 115200 baud
switching console to com0
>> OpenBSD/amd64 BOOT 3.53
boot>
NOTE: random seed is being reused.
booting hd0a:/bsd: 15590680+3761168+305600+0+1167360
[1158148+128+1222128+926180]=0x1705860
entry point at 0xffffffff81001000
###

The above is all normal speed, and after this point all characters are
printed at the speed of around 1 second per character.
For example printing the below in the console:

###
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights
reserved.
Copyright (c) 1995-2022 OpenBSD. All rights reserved.
https://www.OpenBSD.org

OpenBSD 7.1-current (GENERIC) #574: Thu Jun 30 12:08:08 MDT 2022
###

Took around 4-5 minutes.
After:

###
cpu0: Intel(R) Xeon(R) CPU E5-2667 v3 @ 3.20GHz, 3200.02 MHz, 06-3f-02
###

It's speeding up a little.

The host itself runs 7.1-stable, and there are 11 other VMs (running
7.1-stable).
The previou release was an older -current without any issues.
On hardware it boots normal. Anything obvious I am missing?

Mischa