LVM disk vanished from db3.staging.gitlab.com

Today while trying to restore staging using a production backup the disk /var/opt/gitlab vanished. This happened while running pg_restore, resulting in this process failing.

Output of df -h at the moment:

yorickpeterse@db3:/var/opt/gitlab/postgresql/dbdump$ df -h
Filesystem      Size  Used Avail Use% Mounted on
udev             28G     0   28G   0% /dev
tmpfs           5.6G  417M  5.1G   8% /run
/dev/sda1        29G  6.7G   22G  24% /
tmpfs            28G     0   28G   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs            28G     0   28G   0% /sys/fs/cgroup
/dev/sdb1       111G   60M  105G   1% /mnt
tmpfs           5.6G     0  5.6G   0% /run/user/1101
tmpfs           5.6G     0  5.6G   0% /run/user/1025
tmpfs           5.6G     0  5.6G   0% /run/user/1016

Output of lvs:

  LV         VG        Attr       LSize    Pool Origin     Data%  Meta%  Move Log Cpy%Sync Convert
  gitlab_var gitlab_vg owi-a-s--- 1023.00g
  snap       gitlab_vg swi-Ios---  250.00g      gitlab_var 100.00