Comment # 6 on bug 923150 from Diego Ercolani

use_lvmetad was already "1" 

but it isn't enabled
bacula:~ # systemctl status lvm2-lvmetad.service 
lvm2-lvmetad.service - LVM2 metadata daemon
   Loaded: loaded (/usr/lib/systemd/system/lvm2-lvmetad.service; disabled)
   Active: inactive (dead)
     Docs: man:lvmetad(8)

systemctl status lvm2-lvmetad.socket
systemctl status lvm2-monitor.service
bacula:~ # systemctl status lvm2-lvmetad.socket
lvm2-lvmetad.socket - LVM2 metadata daemon socket
   Loaded: loaded (/usr/lib/systemd/system/lvm2-lvmetad.socket; disabled)
   Active: inactive (dead)
     Docs: man:lvmetad(8)
   Listen: /run/lvm/lvmetad.socket (Stream)

bacula:~ # systemctl status lvm2-monitor.service
lvm2-monitor.service - Monitoring of LVM2 mirrors, snapshots etc. using
dmeventd or progress polling
   Loaded: loaded (/usr/lib/systemd/system/lvm2-monitor.service; disabled)
   Active: inactive (dead)
     Docs: man:dmeventd(8)
           man:lvcreate(8)
           man:lvchange(8)
           man:vgchange(8)

I enabled lvm2-lvmetad.socket as stated in /etc/lvm.conf

[snip /etc/lvm/lvm.conf]
    # If lvmetad has been running while use_lvmetad was 0, it MUST be stopped
    # before changing use_lvmetad to 1 and started again afterwards.
    # If use_lvmetad set to 1, please make sure lvm2-lvmetad.socket is started
    use_lvmetad = 1
[/snip]

and remade the initrd

and rebooted....

Yes, I confirm that all the logical volumes are enabled after the boot
I include also the bootlog (journalctl -b)