Update conntrack to the version 1:1.4.7-1, available in https://packages.debian.org/bookworm/conntrack
The current version 1.4.6-2 was released in 2020-04-01
vyos@r4:~$ sudo dpkg -l | grep conntr ii conntrack 1:1.4.6-2 amd64 Program to modify the conntrack tables ii conntrackd 1:1.4.6-2 amd64 Connection tracking daemon
Logs https://git.netfilter.org/conntrack-tools/log/?h=conntrack-tools-1.4.7