Comment # 20 on bug 1175850 from Franck Bui

(In reply to Fabian Vogt from comment #19)
> So is that a systemd bug?

I now remember a shortcoming in libmount which is probably related, see:
https://github.com/systemd/systemd/issues/15266

So basically 'x-initrd.mount' is lost after switching to the rootfs and that's
the reason why PID1 attempts to unmount it during shutdown.

> I got rid of haveged, but it still fails. It seems to finalize cr_var
> properly though, so it's working as expected?

If '/' is hosted on a DM device I would say so.