Comment 4 for bug 1921325

Bionic seems indeed broken in this use case

root@b:~# virsh domrename h-test h-test-newname
Domain successfully renamed

root@b:~# ll /etc/libvirt/qemu/autostart/
total 3
drwxr-xr-x 2 root root 3 Mar 26 08:56 ./
drwxr-xr-x 4 root root 5 Mar 26 09:13 ../
lrwxrwxrwx 1 root root 28 Mar 26 08:56 h-test.xml -> /etc/libvirt/qemu/h-test.xml

You already mentioned that you issue "virsh autostart" again after the rename, which in newer releases isn't needed anymore.

Indeed this will now fail to create the matching link
root@b:~# virsh autostart h-test-newname
Domain h-test-newname marked as autostarted

root@b:~# ll /etc/libvirt/qemu/autostart/
total 3
drwxr-xr-x 2 root root 3 Mar 26 08:56 ./
drwxr-xr-x 4 root root 5 Mar 26 09:13 ../
lrwxrwxrwx 1 root root 28 Mar 26 08:56 h-test.xml -> /etc/libvirt/qemu/h-test.xml

Until I've found the fix (if it is backportable at all) this will be an easy workaround:
root@b:~# ln -s /etc/libvirt/qemu/h-test-newname.xml /etc/libvirt/qemu/autostart/
root@b:~# ll /etc/libvirt/qemu/autostart/
total 3
drwxr-xr-x 2 root root 3 Mar 26 09:15 ./
drwxr-xr-x 4 root root 5 Mar 26 09:13 ../
lrwxrwxrwx 1 root root 36 Mar 26 09:15 h-test-newname.xml -> /etc/libvirt/qemu/h-test-newname.xml