systemd does not like to run with newer kernels if there are new capabilities...

root@buster:~ # systemctl show dnsmasq >/dev/null; echo $?
Failed to parse bus message: Invalid argument
1

I really like that software. NOT.

This breaks many software packages which (have to) use systemd, e.g. Ansible - see Github Ansible Issue #71528

Quick fix for Debian Buster/Backport's /usr/lib/python3/dist-packages/ansible/modules/system/systemd.py (Ansible 2.9.6)

Fixes should go into Ansible 2.10.4 and 2.9.16.