systemd version the issue has been seen with

245.5-2

Used distribution

Debian bullseye

Unexpected behaviour you saw

session dbus-daemon crashed (SIGABRT) in libnss-systemd

Steps to reproduce the problem

I don't know how to reproduce the problem but from my systemd journal it appears to be associated with something running as root using the su command to my user. I think this is the needrestart package using notify-send to switch to my user and notify me of processes needing a restart but I am not sure.